Hypothesize rhymes with:
synthesize, deemphasize, emphasize, fantasize, metastasize, ostracize, overemphasize, reemphasize, romanticize, synthesize
Hypothesize sounds like:
habitat's, habitats, habits, habitues, haft's, hafts, hafts', heifetz, hepatic, hepatitis, hibbitts, hoevet's, hoffitz, hypotheses, hypothesis