Elephants' rhymes with:
elephant's, elephants, elephant's, elephants, elephant's, elephants, elephant's, elephants, infant's, infants, infants'
Elephants' sounds like:
elephant's, elephantiasis, elephants
elephant's, elephants, elephant's, elephants, elephant's, elephants, elephant's, elephants, infant's, infants, infants'
elephant's, elephantiasis, elephants