trade in vs commerce

trade in is not a noun while commerce is a noun.

Word	Noun	Adjective	Verb	Adverb
trade in	No	No	Yes	No
commerce	Yes	No	No	No

trade in (noun)	commerce (noun)
	transactions (sales and purchases) having the objective of supplying commodities (goods and services)
	social exchange, especially of opinions, attitudes, etc.

trade in (verb)	commerce (verb)
turn in as payment or part payment for a purchase