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