Complainant's rhymes with:
complainant, complainant, complainant, complainant, complainant, complainant, suprenant, abstinent, complainant, component, conant, consonant, contaminant, continent, covenant, determinant, dissonant, dominant, eminent, exponent, fagnant, hinnant, immanent, imminent, impertinent, incontinent, indignant, lieutenant, magnant, malignant, midcontinent, opponent, pennant, permanent, predominant, preeminent, pregnant, prominent, proponent, recombinant, remnant, repugnant, resonant, ruminant, semipermanent, stagnant, subcontinent, suprenant, surprenant, tenant, tennant, tennent, tousignant, whisenant, whisnant, whisonant, winant
Complainant's sounds like:
complainants, complaints, complements, compliments