hypothesize vs theorise

hypothesize and theorise both are verbs.

Word	Noun	Adjective	Verb	Adverb
hypothesize	No	No	Yes	No
theorise	No	No	Yes	No

As verbs, hypothesize and theorise are synonyms defined as:

hypothesize and theorise: to believe especially on uncertain or tentative grounds

Other synonyms of hypothesize include conjecture, hypothecate, hypothesise, speculate, suppose, theorize.

hypothesize (verb)	theorise (verb)
to believe especially on uncertain or tentative grounds	to believe especially on uncertain or tentative grounds