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