Here's what rhymes with clefiniteness.
Words that almost rhyme with clefiniteness
numbness fulness oneness roughness toughness baseness buttress dullness dulness piteous rashness justness lameness alumnus cutlass smugness dumbness fungous magus justice compass buttocks duchess fungus muskets lustrous abruptness bulbous luckless nuggets pumice talus bluntness loveless numinous tapas couscous ductless pashas ruckus rumpus abundance buckets colourless encompass reasonableness wondrous neuritis puppets robustness stasis cumbrous unrighteousness wantonness hummocks incubus agreeableness buffets bumptious covets erogenous suitableness substance circumference indulgence conductance inductance sumptuous trumpets bloodless cements couplets repugnance stomachs abutments doublets effulgence fistulous pedants rambunctious judgments adjustments reluctance consultants judgements incumbents remonstrance encumbrance hundredths druggists incumbrance unreasonableness bibulous overabundance overindulgence sibilants readjustments superabundance resultants discussants