Here's what rhymes with sigmoideus.
tailless Words that almost rhyme with sigmoideus
basis famous patience spacious abeyance audacious heinous herbaceous painless bailiffs baseless plainness tameness patients payments gracious courageous stainless cadence contagious nameless outrageous tenacious valence blameless capacious faithless hiatus sameness sebaceous shameless shapeless tasteless waitress faceless lateness mandamus fracas ignoramus mendacious weightless grayness greyness greatness conveyance impatience platelets fallacious pavements vivacious voracious basements faintness ungracious flirtatious graceless salacious straightness statements surveillance attainments claimants efficacious fragrance reagents assailants ostentatious placements strangeness vexatious complaisance repayments vagrants inpatients loquacious quaintness complacence intranets periphrasis profaneness arrangements acquaintance advantageous homeostasis complainants misstatements disputatious engagements entertainments replacements emplacements displacements disadvantageous rearrangements