check into vs suss out

check into and suss out both are verbs.

Word	Noun	Adjective	Verb	Adverb
check into	No	No	Yes	No
suss out	No	No	Yes	No

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

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

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

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