size up vs scrutinise

size up and scrutinise both are verbs.

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

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

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

Other synonyms of size up include scrutinize, take stock.

size up (verb)	scrutinise (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