1 Syllablelustre
Now you can make multisyllabic rhymes in the new rhymit app :)
2 Syllablesblubber, bluster, brother, bubbler, buckler, buffer, bugger, bummer, bunker, bustard, buster, butler, butter, buzzard, buzzer, chuddar, cluster, clutter, color, colorffd, colour, comer, coupler, cover, covert, coverts, cruller, crupper, cummer, cupboard, custard, cutler, cutter, drummer, drunkard, duffer, dullard, duster, flutter, glover, gunner, gunnerd, gusher, gutter, hover, huckster, hunger, hunker, hustler, juggler, juncture, lover, lubber, lugger, lunger, luster, monger, mother, mucker, muffler, mugger, mummer, mustard, muster, mutter, nuggar, oner, other, plover, plumber, pucker, puncture, rubber, rudder, rugger, rummer, runner, rupture, rustler, scrubber, sculler, scupper, shudder, shutter, slubber, sluggard, smother, someone, splutter, sputter, structure, stunner, stutter, succour, sucker, suffer, summer, supper, sutler, tother, toucher, trucker, tucker, tusker, udder, upper, upward, usher, utter
3 Syllablesabductor, adductor, another, blubbered, blustered, brotherhod, brotherred, buffered, bufferred, buggered, bunkered, busterud, buttered, clustered, cluttered, colored, colormid, coloroid, conductor, conjuncture, covered, coversed, covertnes, decolor, destructor, discolor, discolour, discover, discovert, fishmonger, fluttered, goatsucker, godmother, grandmother, guttered, gutterud, hovered, huckstered, hungered, hungerwed, hunkered, inductor, instructor, landlubber, loveread, lovered, loverhod, lustered, midsummer, mongered, mothered, mothergod, motherhod, muggered, muggerud, mustered, muttered, newsmonger, oneread, puckered, punctured, re-cover, rebutter, recover, rumrunner, ruptured, seersucker, shuddered, shuttered, slubbered, smothered, spluttered, sputtered, stepmother, structured, stuttered, substructure, suckered, suffered, summered, swashbuckler, tuckered, uddered, uncover, ushered, uttered, warmonger, windhover, wood-cutter, woodcutter
4 Syllablescheesemonger, decolored, discolored, discoloured, discovered, filibuster, godmotherhod, grandmotherhod, housemother, interrupter, ironmonger, nonconductor, recovered, scandalmonger, scaremonger, speculator, stepmotherhod, superstructure, surrebutter, uncovered, undercover
5 Syllablesfilibustered, multi-coloured, multicoloured, semiconductor, undercovered