Motives rhymes with:
automotive's, locomotives, automotive's, locomotives, active's, actives, additives, adjectives, alternatives, automotive's, captives, collectives, conservatives, conservatives', contraceptives, cooperatives, derivatives, detective's, detectives, directives, disincentives, electives, executive's, executives, executives', expletives, fixatives, fugitives, imperatives, incentives, initiatives, laxatives, locomotives, narratives, natives, negatives, neoconservatives, nonnatives, objectives, octaves, operatives, palliatives, performatives, perspectives, positives, prerogatives, preservatives, preventatives, relative's, relatives, representative's, representatives, representatives', superlatives
Motives sounds like:
medaphis, medivac, metaphysics, metavsky, midpac, midpac's, midwives, mitofsky, modifies, montefusco, motifs, mouthpiece, mouthpieces