check up on vs suss out

check up on and suss out both are verbs.

Word	Noun	Adjective	Verb	Adverb
check up on	No	No	Yes	No
suss out	No	No	Yes	No

As verbs, check up on and suss out are synonyms defined as:

check up on and suss out: examine so as to determine accuracy, quality, or condition

Other synonyms of check up on include check, check into, check out, check over, go over, look into.

check up on (verb)	suss out (verb)
examine so as to determine accuracy, quality, or condition	examine so as to determine accuracy, quality, or condition