Word: 

Words and phrases that rhyme with theorise:  (4 results)
2 syllables:
clear eyes, we rise
3 syllables:
bacterise, mobirise
Words and phrases that almost rhyme †:  (20 results)
2 syllables:
spirits, maurice, orris, morris, naris, doris, harris, paris, iris, derris, merits, norris
3 syllables:
slow loris, herb paris, osiris, clitoris, arborise, barbarise
4 syllables:
extemporise
5 syllables:
plaster of paris
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