Mankinds rhymes with:
mankind's, mankind's, mankind's, kinds, mankind's, behinds, binds, blinds, finds, grinds, hinds, kinds, mankind's, mind's, minds, reminds, rinds
Mankinds sounds like:
macintax, macintosh, macintosh's, macintoshes, mackintosh, magnates, magnet's, magnetek, magnetic, magnetics, magnets, magnitudes, management's, managements, managements', mankind's, massenet's, mccants, mcintosh, mismatch, mismatches, monsanto's