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