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