auction off vs commerce

auction off is not a noun while commerce is a noun.

Word	Noun	Adjective	Verb	Adverb
auction off	No	No	Yes	No
commerce	Yes	No	No	No

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

auction off (verb)	commerce (verb)
sell at an auction