Proliferating rhymes with:
perforating, accelerating, collaborating, commemorating, cooperating, corroborating, decelerating, decorating, degenerating, deliberating, deteriorating, elaborating, evaporating, exaggerating, exasperating, exhilarating, exonerating, generating, inaugurating, incarcerating, incinerating, incorporating, invigorating, liberating, moderating, nonoperating, obliterating, operating, perforating, recuperating, redecorating, regenerating, reincorporating, reinvigorating, reiterating, reverberating, saturating, separating, tolerating, venerating