Scientists' rhymes with:
scientist's, scientists, scientist's, scientists, scientist's, scientists, adventists, dentist's, dentists', scientist's, scientists
Scientists' sounds like:
scientist's, scientists, syndicate's, syndicates, syndicats
scientist's, scientists, scientist's, scientists, scientist's, scientists, adventists, dentist's, dentists', scientist's, scientists
scientist's, scientists, syndicate's, syndicates, syndicats