construct vs theorize

construct is a noun but theorize is not a noun.

Word	Noun	Adjective	Verb	Adverb
construct	Yes	No	Yes	No
theorize	No	No	Yes	No

As verbs, theorize is a hypernym of construct; that is, theorize is a word with a broader meaning than construct:

Other hypernyms of construct include conjecture, hypothecate, hypothesise, hypothesize, speculate, suppose, theorise.

construct (noun)	theorize (noun)
an abstract or general idea inferred or derived from specific instances

construct (verb)	theorize (verb)
reassemble mentally	to believe especially on uncertain or tentative grounds
draw with suitable instruments and under specified conditions	form or construct theories
make by combining materials and parts	construct a theory about
put together out of artificial or natural components or parts
create by organizing and linking ideas, arguments, or concepts
create by linking linguistic units