Here's what rhymes with chaperonin.
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chaperoning zoning moaning atoning droning honing loaning phoning toning boning bonging cloning combing foaming groaning roaming homing bemoaning buttoning stoning disowning doming tenoning condoning telephoning gloaming intoning rezoning blazoning syphoning chroming cottoning backcombing postponing unbuttoning honeycombing megaphoning emblazoning eosin yogin boatmen tocsin doeskin unwoven foreskin goatskin postmen unfrozen spokesmen