2 syllables:
'w' hour, auer, bauer, baur, bougher, bower, brauer, brougher, brower, clouer, clower, cower, dauer, dour, f-hour, flour, flower, fower, frower, gauer, giaour, glower, gower, grauer, h-hour, hauer, hour, how're, hower, how her, kauer, klauer, knauer, l-hour, lauer, mauer, nauer, now her, our, plougher, plower, prower, rauer, sauer, schauer, scour, shower, souir, sour, tauer, tower, trauer, trower, vower

3 syllables:
airpower, allower, allow her, avower, badflower, ball-flower, ballflower, beebower, beflower, belflower, bellflower, bell tower, bloodflower, blood flower, brainpower, bunchflower, cheeseflower, church tower, clock tower, coneflower, cornflour, cornflower, crepe flower, crowflower, cupflower, dayflower, deflour, deflower, devour, efflower, embower, empower, endower, enflower, fillauer, firepower, flame-flower, flameflower, flame flower, foamflower, foreshower, gang-flower, gerstlauer, globeflower, globe flower, great-power, half-hour, high-power, hightower, horse-power, horsepower, hufbauer, icepower, impower, kowtower, landauer, light hour, liptauer, litauer, low-power, lung-power, lyre-flower, lyreflower, man-hour, manpower, man hour, matt lauer, mayflower, mist-flower, mistflower, monkflower, moonflower, mossflower, noon-flower, off-hour, outpower, pasque-flower, pasque flower, pea flour, pink shower, rain shower, ray flower, reflower, repower, rush-hour, rush hour, safflower, schongauer, seapower, shad-flower, shadflower, shall-flower, shell-flower, shellflower, shot tower, simtower, snail-flower, snailflower, snail flower, soy flour, spoonflower, starflower, strawflower, sunflower, sunpower, sunshower, swan-flower, swanflower, tail-flower, tailflower, thatpower, three-hour, tongue-flower, tongueflower, trustpower, twinflower, unflower, unpower, wallflower, wandflower, watchtower, watt-hour, waxflower, welltower, wheat flour, wildflower, wild flower, willpower, windflower, windpower, zembower

4 syllables:
ampere-hour, balloon flower, basket flower, blanketflower, blanket flower, broccoflower, butter-flower, butterflower, by the hour, candlepower, cauliflower, chiggerflower, christmas flower, colliflower, compass flower, conning tower, control tower, cooling tower, corkscrew flower, cuckooflower, cuckoo flower, cushion flower, disavower, disempower, eisenhower, elderflower, fennelflower, fennel flower, finger-flower, fingerflower, fire tower, garland flower, gilliflower, gillyflower, graham flour, guinea flower, gutterflower, happy hour, helmetflower, helmet flower, honey-flower, honeyflower, hyperpower, icenhower, jeddah tower, july-flower, leather flower, lumen-hour, marsh bellflower, miles per hour, mooring tower, motivepower, nutmeg flower, old maid flower, overpower, paper flower, pasqueflower, passionflower, peacock flower, person hour, pisco sour, pricasour, quarter-hour, rainbow shower, redbird flower, satin-flower, satin flower, soybean flour, spiderflower, spider flower, starfish flower, superpower, swamp sunflower, tall bellflower, tall sunflower, tassel flower, treasure flower, trumpet flower, underpower, vavasour, velvet flower, virgin's bower, waterpower, water tower, whiskey sour, whisky sour, whole meal flour, whole wheat flour, womanpower, wonder flower, zero hour

5 syllables:
alpine sunflower, browning hi-power, butterfly flower, cardinal flower, carrion flower, chimney bellflower, clustered bellflower, common sunflower, creeping bellflower, desert sunflower, dwight eisenhower, eastern pasque flower, eleventh-hour, fiesta flower, flamingo flower, giant sunflower, horsepower-hour, ivory tower, kilowatt-hour, kilowatt hour, martello tower, megawatt-hour, meteor shower, moccasin flower, nuclear-power, olympic tower, paradise flower, peopleperhour, prairie coneflower, prairie sunflower, proboscis flower, scarlet musk flower, semester hour, showy sunflower, spreading bellflower, supporting tower, western wall flower, woolly sunflower

6 syllables:
artificial flower, blue cardinal flower, dwight d. eisenhower, evening trumpet flower, everlasting flower, flower-of-an-hour, flowers-of-an-hour, jamie campbell bower, mexican sunflower, nepal trumpet flower, observation tower, purple virgin's bower

7 syllables:
dwight david eisenhower, kilometers per hour, siberian wall flower

10 syllables:
jerusalem artichoke sunflower

2 syllables:
scourer

3 syllables:
devourer