4 letters:
bite, byte, cite, kite, lite, mite, nite, reit, rite, site

5 letters:
-cyte, bight, brite, dight, fight, flite, hight, leyte, light, might, night, quite, right, sight, smite, spite, tight, trite, twite, unite, white, wight, write

6 letters:
albite, alight, aplite, aright, bright, dwight, excite, finite, flight, fomite, fright, gunite, height, ignite, incite, indict, indite, invite, iolite, knight, lucite, oocyte, ophite, pinite, plight, polite, ratite, recite, shiite, slight, somite, sprite, wright

7 letters:
acolyte, aconite, adamite, alright, alunite, amorite, apatite, axinite, azurite, bedight, benight, biotite, bornite, brucite, calcite, cordite, cyanite, delight, despite, diorite, ebonite, edomite, elamite, eremite, erudite, exabyte, felsite, gothite, hittite, hoplite, hussite, hyalite, ichnite, insight, jadeite, kainite, kunzite, kyanite, leucite, lignite, luddite, lyddite, marlite, marmite, melkite, moabite, niobite, on-site, partite, picrite, requite, reunite, rewrite, samnite, sleight, stylite, sulfite, syenite, sylvite, tektite, thorite, tonight, upright, uptight, uranite, website, zeolite, zincite, zoisite

8 letters:
aerolite, affright, airtight, albright, allanite, ammonite, analcite, andesite, andosite, ankerite, annamite, aphanite, appetite, arsenite, autunite, backbite, bakelite, basanite, bobwhite, boracite, box kite, bronzite, brookite, calamite, campsite, catamite, cenobite, chromite, contrite, copalite, cronkite, cryolite, datolite, daylight, disunite, dogfight, dog bite, dolerite, dolomite, dynamite, ebionite, eclogite, epiphyte, essonite, euxenite, expedite, eyesight, fanlight, fayalite, fluorite, galenite, geophyte, gigabyte, goethite, graphite, gunfight, gunsight, hematite, ilmenite, impolite, in sight, jacobite, jarosite, kibibyte, kilobyte, laterite, lazulite, lewisite, limonite, malecite, maronite, masonite, masorite, megabyte, melanite, melchite, midnight, minorite, monazite, monocyte, nazarite, neophyte, off-site, outfight, outright, overbite, parasite, penlight, petabyte, petalite, phyllite, pisolite, prehnite, reignite, retinite, rhyolite, selenite, sennight, siderite, skylight, smectite, sodalite, steatite, stellite, stibnite, stilbite, sulphite, sunlight, sybarite, taconite, terabyte, titanite, trachyte, twilight, urbanite, zaratite, zoophyte

9 letters:
adipocyte, aerophyte, albertite, all-right, all right, almandite, amazonite, amebocyte, anchorite, andradite, anglesite, anhydrite, anorthite, apartheid, aragonite, arc light, argentite, argillite, astrocyte, atacamite, austenite, autophyte, backlight, backsight, batholite, bedlamite, bentonite, bipartite, bombsight, bomb site, bryophyte, bullfight, canaanite, carmelite, carnotite, cellulite, cementite, ceylonite, chalybite, chamosite, chondrite, cobaltite, cockfight, coenobite, columbite, coprolite, copyright, covellite, crossbite, deadlight, diatomite, downright, egg white, elaterite, endophyte, enstatite, erythrite, evaporite, extradite, eyebright, far-right, firefight, firelight, fistfight, flea bite, footlight, foresight, fortnight, frostbite, fulgurite, gelignite, germanite, geyserite, gilsonite, glycerite, goodnight, granulite, haematite, halophyte, handwrite, headlight, hell-kite, hessonite, hiddenite, highlight, hindsight, in-flight, incondite, in flight, israelite, itch mite, jacklight, kaolinite, kieserite, labrocyte, lamplight, land site, leucocyte, leukocyte, limelight, lintwhite, macrocyte, magnesite, magnetite, malachite, manganite, marcasite, mastocyte, mennonite, mesophyte, meteorite, microcyte, moonlight, morganite, muscovite, myelocyte, natrolite, nephelite, niccolite, nummulite, off-white, olivenite, osteocyte, overnight, oversight, overwrite, own right, ozocerite, ozokerite, pegmatite, phagocyte, phenacite, phonolite, phosphite, pollucite, preterite, put right, quartzite, recondite, red light, rhodolite, rhodonite, rubellite, rushlight, safelight, saprolite, satellite, scapolite, scheelite, scolecite, sepiolite, sidelight, sit tight, snakebite, socialite, spotlight, stagirite, starlight, stoplight, sylvanite, taillight, tantalite, thymocyte, tremolite, tridymite, trilobite, troostite, tungstite, typewrite, uraninite, variolite, variscite, vivianite, vulcanite, wavellite, wax light, weeknight, wernerite, willemite, witherite, wulfenite, xerophyte, yottabyte, ytterbite, zettabyte, zinkenite

10 letters:
achondrite, actinolite, akaryocyte, amoebocyte, anthracite, antimonite, argyrodite, asphaltite, bastnasite, benedicite, birthright, black kite, blastocyte, bournonite, carnallite, cartwright, catabolite, chalcocite, choanocyte, chrysolite, colemanite, cordierite, cyanophyte, drill site, earthlight, emit light, fahrenheit, flashlight, floodlight, forthright, gadolinite, gametocyte, gang fight, garnierite, ghostwrite, glauberite, glauconite, good night, graptolite, half-light, hepatocyte, heulandite, histiocyte, hold tight, hydrophyte, hygrophyte, indicolite, ishmaelite, just right, kimberlite, lepidolite, lily-white, lithophyte, lymphocyte, macrophyte, martensite, megalocyte, melanocyte, metabolite, microphyte, millwright, nightlight, novaculite, open sight, osteophyte, paragonite, peep sight, phlogopite, phosgenite, plasmacyte, playwright, plebiscite, plowwright, polybasite, poor white, prizefight, psilophyte, pyrolusite, pyroxenite, pyrrhotite, rear light, samarskite, saprophyte, shipwright, siderocyte, smaragdite, snow-white, sound bite, sperrylite, sphalerite, spherocyte, spherulite, sporophyte, stalactite, stalagmite, staurolite, sticktight, theodolite, this night, top-flight, topazolite, torbernite, torchlight, tripartite, troglodyte, trotskyite, underwrite, vanadinite, very light, wainwright, watertight, with spite, wolframite, zinc white

11 letters:
acanthocyte, alexandrite, amblygonite, amphibolite, anorthosite, apophyllite, baddeleyite, bastnaesite, battlesight, brake light, burial site, candlelight, cassiterite, chiastolite, chlorophyte, civil right, crocidolite, cryptophyte, crystallite, electrolyte, erythrocyte, every night, fergusonite, first light, franklinite, gametophyte, granulocyte, greenockite, green light, guest night, hausmannite, human right, inner light, insect bite, itacolumite, klieg light, knife fight, langbeinite, large white, legal right, madreporite, molybdenite, nephelinite, night-sight, pentlandite, phillipsite, phosphorite, pilot light, proxy fight, searchlight, sillimanite, small white, smithsonite, spaceflight, spessartite, spider mite, stage right, streetlight, suburbanite, take flight, tetradymite, thallophyte, thrombocyte, vermiculite, vesuvianite, vigil light, wagonwright, watch night, water right, wheelwright, yesternight, zinnwaldite

12 letters:
anchor light, beacon light, bengal light, blatherskite, b lymphocyte, camping site, chalcanthite, chalcopyrite, cristobalite, dermatophyte, ectoparasite, endoparasite, entoparasite, euglenophyte, fluorapatite, fly-by-night, harvest mite, hemiepiphyte, hemimorphite, hemiparasite, hug-me-tight, multipartite, myrmecophyte, nitrocalcite, out of sight, patent right, pearly-white, pillow fight, ploughwright, pteridophyte, pyromorphite, pyrophyllite, quarterlight, ray of light, reticulocyte, riding light, second sight, semiepiphyte, signal light, spermatocyte, stage fright, stakhanovite, stromatolite, strontianite, tetrahedrite, thortveitite, t lymphocyte, voting right, waggonwright, water sprite, white knight, wisconsinite, wollastonite, yellow light

13 letters:
anthophyllite, antisatellite, archimandrite, beam of light, bird of night, building site, calcium light, carpet knight, chicken fight, city of light, come to light, day-and-night, guiding light, hermaphrodite, hyperparasite, hypophosphite, leading light, lepidocrocite, line of sight, meadow bright, megakaryocyte, microgliacyte, mosquito bite, neurogliacyte, opening night, place upright, quadripartite, rhodochrosite, running light, spermatophyte, spy satellite, theater light, traffic light, twelfth night, visible light, warning light, wedding night, writ of right

14 letters:
antimetabolite, at first sight, electric light, free phagocyte, hydroxyapatite, infrared light, launching site, lechatelierite, line of flight, nonstop flight, property right, religious rite, shaft of light, speed of light, terrain flight

15 letters:
black-and-white, black and white, domestic flight, exclusive right, fixed phagocyte, lechartelierite, megagametophyte, midsummer night, montmorillonite, new hampshirite, oligodendrocyte, panoramic sight, polyelectrolyte, red spider mite, st john's night, telescope sight, turkish delight, undivided right

16 letters:
in her own right, in his own right, in its own right, low level flight, malaria parasite, preemptive right, telescopic sight, toxic waste site

17 letters:
degree fahrenheit, lady-of-the-night, ultraviolet light, weather satellite

18 letters:
galilean satellite, gardener's delight, in one's own right, queen of the night, subscription right

19 letters:
astronomy satellite, not by a long sight, pseudohermaphrodite, sweetness and light

20 letters:
artificial satellite, international flight, not by a blame sight

24 letters:
communications satellite, meteorological satellite