Corroborating rhymes with:
collaborating, deliberating, elaborating, liberating, reverberating, accelerating, collaborating, commemorating, cooperating, decelerating, decorating, degenerating, deliberating, deteriorating, elaborating, evaporating, exaggerating, exasperating, exhilarating, exonerating, generating, inaugurating, incarcerating, incinerating, incorporating, invigorating, liberating, moderating, nonoperating, obliterating, operating, perforating, proliferating, recuperating, redecorating, regenerating, reincorporating, reinvigorating, reiterating, reverberating, saturating, separating, tolerating, venerating
Corroborating sounds like:
checkerboarding, corporation's, corporations, corporations'