expect vs theorise

expect and theorise both are verbs.

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

As verbs, theorise is a hyponym of expect; that is, theorise is a word with a more specific, narrower meaning than expect:

expect (verb)	theorise (verb)
be pregnant with	to believe especially on uncertain or tentative grounds
look forward to the birth of a child
regard something as probable or likely
look forward to the probable occurrence of
consider reasonable or due
consider obligatory; request and expect