Word's rhymes with:
n_words, words, bird's, birds, birds', byrd's, gerdes, gerdes', girds, herds, kurds, nerds, n_words, third's, thirds, twothirds, words
Word's sounds like:
ward's, wards, warheads, warts, weerts, weirdos, werts, wertz, wirtz, words, worth's, worthies, worthog, worths, worts, wreaths, writes, writs, wuertz, wurtz