Here's what rhymes with unfallacious.
voracious gracious audacious fallacious salacious spacious herbaceous sebaceous vivacious ungracious efficacious tenacious capacious vexatious flirtatious loquacious mendacious ostentatious Words that almost rhyme with unfallacious
basis races raises laces cases places faces bases phases phrases traces praises vases braces gazes chases glazes mesas spaces fireplaces homeostasis metastases paraphrases famous patience heinous lateness plainness fracas patients greatness courageous cadence nameless outrageous valence blameless faithless hiatus painless sameness shameless shapeless waitress bailiffs baseless faceless graceless straightness weightless payments impatience stainless surveillance claimants fragrance platelets reagents abeyance strangeness tasteless faintness mandamus contagious assailants pavements placements basements repayments vagrants ignoramus inpatients quaintness arrangements statements acquaintance advantageous conveyance attainments complainants complaisance engagements displacements replacements rearrangements emplacements misstatements entertainments disadvantageous