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