3 letters:
eke

4 letters:
baek, beak, beek, chic, deak, geac, geek, leak, leek, meek, paek, peak, peek, reek, riek, seaq, seek, siek, sikh, teac, teak, weak, week, weik, zeek, zeke

5 letters:
a.c.c, aleak, apeak, aqeeq, aqsiq, areek, batik, beeck, bleak, bleek, c.c.c, cheek, cheik, cleek, creak, creek, deike, dieck, dique, fasiq, feick, ffiec, fleak, fleek, freak, freek, gieck, gleek, greek, heeke, kmiec, kreke, kriek, kweek, leake, leick, mediq, mieke, mique, nique, ny hk, obliq, peake, pique, pre-k, qepiq, reeck, reick, rieck, rieke, sadiq, sheek, sheik, shiek, sieck, sleek, sleeq, smeac, sneak, sneek, speak, speek, speke, steek, steik, tariq, theke, tieck, tique, topek, tpc-c, tweak, tweek, udeac, vidiq, weick, wieck, wreak, wreke

6 letters:
-speak, awreak, beseek, caique, caseic, cheekh, cheikh, clique, crique, debeak, espeak, fesikh, figeac, kaique, laique, lantiq, mcpeak, mcpeek, ntsc-c, phreak, pre-cc, quique, reseek, riecke, screak, seric-, sheikh, shriek, siddiq, skreak, speake, squeak, streak, streek, tadjik, tc iec, trique, tuwaiq, unique, upseek

7 letters:
afrique, alutiiq, antique, aplique, attique, belleek, bespeak, bezique, cacique, cappeak, cazique, chimaek, colique, comique, comptiq, conique, dreieck, e-speak, ensoniq, hpnotiq, ic3peak, iquique, joystiq, katwijk, komatik, lalique, leveque, logique, maaseik, magique, marieke, mashriq, mcpeake, midweek, miskick, monatik, monique, musique, niemiec, nonpeak, oblique, olmaliq, optique, panique, perique, ps piec, repique, respeak, salique, shareek, silique, tonique, traweek, tzaddiq, unspeak, upspeak, vanbeek, zaqaziq

8 letters:
amerique, arctique, artspeak, ashcreek, asiaweek, atomique, autoweek, balsamiq, barrique, belgique, bestreak, biblique, biunique, boutique, cantique, celtique, chimique, clinique, cramique, critique, ecofreak, exotique, fabrique, fedspeak, forepeak, forspeak, gramatik, grosbeak, halfbeak, hatebeak, henrique, hexspeak, infoseek, ironique, karaweik, kortrijk, liveleak, lodewijk, longbeak, maggie q, manrique, mesopeak, mid-week, mis-teeq, misspeak, mo'nique, mustique, mystique, nastaliq, nautique, netspeak, newspeak, newsweek, nongreek, off-peak, outspeak, overweak, physique, pratique, rijswijk, rustique, seatgeek, siddique, soulseek, tragique, waalwijk, whitweek, workweek

9 letters:
angelique, annemieke, apathique, asiatique, canonique, coyhaique, crossbeak, csscs eac, digispeak, dominique, domonique, domotique, doorcheek, drastique, dynamique, each week, etterbeek, evilspeak, fenugreek, firecreek, forespeak, gastrique, geekspeak, goldcreek, grossbeak, henriques, henriquez, holy week, houseleek, hygrodeik, illogique, islamique, khanbaliq, laconique, lapstreak, leetspeak, leetspeek, midrashic, millcreek, moneyweek, motorweek, moustique, mukhayriq, neo-greek, newsqueak, non-greek, noordwijk, ortanique, overspeak, pipsqueak, politique, redstreak, richcreek, rose leek, sand leek, sceptique, teamspeak, technique, textspeak, unbespeak, vankleeck, veronique, wild leek

10 letters:
agnostique, alcoolique, allergique, analogique, analytique, antalgique, apolitique, argentique, aromatique, artistique, biologique, carbonique, chesapeake, cross-week, domestique, dramatique, elderspeak, electrique, every week, green-leek, hairstreak, harderwijk, healthweek, historique, kinderdijk, koninklijk, kralendijk, lap-streak, late greek, manistique, martinique, mocambique, mozambique, north peak, ordu-baliq, pip-squeak, pyeongtaek, romantique, schaerbeek, sci-hub.cc, starstreak, stickybeak, swardspeak, thingspeak, vanderbeek, widowspeak, yesterweek

11 letters:
afsluitdijk, aggregateiq, antarctique, authentique, automatique, battlecreek, beavercreek, bibliotheek, biochimique, boeremusiek, doctorspeak, doublespeak, electroweak, excentrique, fantastique, lady's leek, meadow leek, proto-greek, so to speak, take a leak, teleferique, valleyspeak

12 letters:
abandonnique, antiseptique, autocritique, businessweek, crimson peak, double-speak, freek-a-leek, humoristique, informatique, middle greek, modern greek, passion week, peripherique, postcritique, reach a peak, torrentfreak, verd-antique, widow's peak

13 letters:
ancient greek, bottom-unique, calendar week, cardiotonique, chronologique, gothboiclique, hide-and-seek, japanese leek, losing streak, mountain peak, pine grosbeak, tomato streak, verde antique

14 letters:
dawson's creek, medieval greek, microtechnique, schitt's creek, winning streak

15 letters:
byzantine greek, classical greek, day of the week, tongue-in-cheek, virgil van dijk

16 letters:
evening grosbeak, hide-and-go-seek, hide and go seek, loire-atlantique, powder technique

17 letters:
bubble and squeak, cardinal grosbeak

18 letters:
craig of the creek, france antarctique, pomodoro technique, straddle technique, thereportoftheweek

21 letters:
capital of mozambique

26 letters:
coital alignment technique

29 letters:
names of the days of the week