size up vs scrutinize

size up and scrutinize both are verbs.

Word	Noun	Adjective	Verb	Adverb
size up	No	No	Yes	No
scrutinize	No	No	Yes	No

As verbs, size up and scrutinize are synonyms defined as:

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

Other synonyms of size up include scrutinise, take stock.

size up (verb)	scrutinize (verb)
to look at critically or searchingly, or in minute detail	examine carefully for accuracy with the intent of verification
	to look at critically or searchingly, or in minute detail