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