hypothesise vs theorise

hypothesise and theorise both are verbs.

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

As verbs, hypothesise and theorise are synonyms defined as:

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

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

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