size up vs take stock

size up and take stock both are verbs.

Word	Noun	Adjective	Verb	Adverb
size up	No	No	Yes	No
take stock	No	No	Yes	No

As verbs, size up and take stock are synonyms defined as:

size up and take stock: to look at critically or searchingly, or in minute detail

Other synonyms of size up include scrutinise, scrutinize.

size up (verb)	take stock (verb)
to look at critically or searchingly, or in minute detail	to look at critically or searchingly, or in minute detail
	make or include in an itemized record or report