look into vs suss out

look into and suss out both are verbs.

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

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

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

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

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