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, power, prower, rauer, sauer, schauer, scour, shower, souir, sour, tauer, tower, trauer, trower, vower, -goer, blower, bowar, broer, cloer, doe er, dougher, faer oer, goair, goer, groer, grower, jowar, khowar, knower, know her, lower, mower, poer, roher, rower, schroer, show her, slower, sowar, sower, so her, stower, though her, thrower, throw her, vloer

3 syllables:
airpower, air power, allower, allow her, avower, badflower, ball-flower, ballflower, 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, fourth power, gang-flower, gerstlauer, globeflower, globe flower, great-power, 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, sea power, shad-flower, shadflower, shall-flower, shell-flower, shellflower, shot tower, simtower, snail-flower, snailflower, snail flower, soy flour, spoonflower, starflower, stock power, strawflower, sunflower, sunpower, sunshower, swan-flower, swanflower, tail-flower, tailflower, thatpower, third power, three-hour, tongue-flower, tongueflower, trustpower, twinflower, unflower, unpower, wallflower, wandflower, watchtower, watt-hour, waxflower, welltower, wheat flour, wildflower, wild flower, willpower, windflower, windpower, wind power, world power, zembower, although her, apoer, aroer, below her, bestower, churchgoer, d.o.a, dart thrower, filmgoer, flame-thrower, flamethrower, foregoer, forgoer, glass-blower, glassblower, guicowar, hand blower, hand mower, hornblower, lawn mower, mampoer, manowar, mindblower, outgoer, playgoer, racegoer, snowblower, snow blower, snow thrower, spear-thrower, spear thrower, trumpower, willower, winegrower, winnower, woolgrower

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, drawing power, eisenhower, elderflower, fennelflower, fennel flower, finger-flower, fingerflower, fire tower, flower power, 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, legal power, lumen-hour, major power, marsh bellflower, miles per hour, mooring tower, motivepower, motive power, nutmeg flower, old maid flower, overpower, paper flower, pasqueflower, passionflower, peacock flower, person hour, pisco sour, pricasour, quarter-hour, rainbow shower, redbird flower, rise to power, satin-flower, satin flower, second power, solar power, soybean flour, spiderflower, spider flower, starfish flower, staying power, 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, chapelgoer, concert-goer, concertgoer, foreknower, grenade thrower, michael oher, motor mower, moviegoer, operagoer, overthrower, overtower, partygoer, power mower, riding mower, whistle-blower, whistleblower, wojnilower

5 syllables:
acoustic power, alpine sunflower, atomic power, balance of power, browning hi-power, butterfly flower, cardinal flower, carrion flower, chimney bellflower, clustered bellflower, common sunflower, creeping bellflower, desert sunflower, dwight eisenhower, eastern pasque flower, electric power, eleventh-hour, fiesta flower, flamingo flower, giant sunflower, horsepower-hour, ivory tower, kilowatt-hour, kilowatt hour, magical power, martello tower, megawatt-hour, meteor shower, moccasin flower, nuclear-power, nuclear power, olympic tower, paradise flower, peopleperhour, prairie coneflower, prairie sunflower, proboscis flower, reflective power, resolving power, scarlet musk flower, semester hour, showy sunflower, spreading bellflower, supporting tower, western wall flower, woolly sunflower, cinemagoer, gallerygoer, palingoproer, picturegoer, theatre-goer, theatregoer

6 syllables:
artificial flower, blue cardinal flower, dwight d. eisenhower, electrical power, 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, the 48 laws of power

7 syllables:
dwight david eisenhower, kilometers per hour, siberian wall flower, three-phase electric power

8 syllables:
thorium-based nuclear power

10 syllables:
jerusalem artichoke sunflower