2 syllables:
'w' hour, auer, bauer, baur, bougher, bower, brauer, brougher, brower, clouer, clower, cower, dauer, dour, f-hour, flour, 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

3 syllables:
airpower, air power, allower, allow her, avower, badflower, ball-flower, ballflower, beebower, beflower, belflower, bellflower, bell tower, bloodflower, brainpower, bunchflower, cheeseflower, church tower, clock tower, coneflower, cornflour, cornflower, crowflower, cupflower, dayflower, deflour, deflower, devour, efflower, embower, empower, endower, enflower, fillauer, firepower, flame-flower, flameflower, foamflower, foreshower, fourth power, gang-flower, gerstlauer, globeflower, 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, pea flour, pink shower, rain shower, 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, 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, willpower, windflower, windpower, wind power, world power, zembower

4 syllables:
ampere-hour, blanketflower, broccoflower, butter-flower, butterflower, by the hour, candlepower, cauliflower, chiggerflower, colliflower, conning tower, control tower, cooling tower, cuckooflower, disavower, disempower, drawing power, eisenhower, elderflower, fennelflower, finger-flower, fingerflower, fire tower, flower power, gilliflower, gillyflower, graham flour, gutterflower, happy hour, helmetflower, honey-flower, honeyflower, hyperpower, icenhower, jeddah tower, july-flower, legal power, lumen-hour, major power, marsh bellflower, miles per hour, mooring tower, motivepower, motive power, overpower, pasqueflower, passionflower, person hour, pisco sour, pricasour, quarter-hour, rainbow shower, rise to power, satin-flower, second power, solar power, soybean flour, spiderflower, staying power, superpower, swamp sunflower, tall bellflower, tall sunflower, underpower, vavasour, virgin's bower, waterpower, water tower, whiskey sour, whisky sour, whole meal flour, whole wheat flour, womanpower, zero hour

5 syllables:
acoustic power, alpine sunflower, atomic power, balance of power, browning hi-power, chimney bellflower, clustered bellflower, common sunflower, creeping bellflower, desert sunflower, dwight eisenhower, electric power, eleventh-hour, giant sunflower, horsepower-hour, ivory tower, kilowatt-hour, kilowatt hour, magical power, martello tower, megawatt-hour, meteor shower, nuclear-power, nuclear power, olympic tower, peopleperhour, prairie coneflower, prairie sunflower, reflective power, resolving power, semester hour, showy sunflower, spreading bellflower, supporting tower, woolly sunflower

6 syllables:
dwight d. eisenhower, electrical power, flower-of-an-hour, flowers-of-an-hour, jamie campbell bower, mexican sunflower, observation tower, purple virgin's bower, the 48 laws of power

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

8 syllables:
thorium-based nuclear power

10 syllables:
jerusalem artichoke sunflower

2 syllables:
scourer

3 syllables:
devourer