dealings vs transaction

dealings and transaction both are nouns.

Word	Noun	Adjective	Verb	Adverb
dealings	Yes	No	No	No
transaction	Yes	No	No	No

As nouns, dealings and transaction are synonyms defined as:

dealings and transaction: the act of transacting within or between groups (as carrying on commercial activities)

Other synonyms of dealings include dealing.

dealings (noun)	transaction (noun)
the act of transacting within or between groups (as carrying on commercial activities)	the act of transacting within or between groups (as carrying on commercial activities)
social or verbal interchange (usually followed by `with')
mutual dealings or connections or communications among persons or groups