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