purchase vs commerce

purchase and commerce both are nouns.

Word	Noun	Adjective	Verb	Adverb
purchase	Yes	No	Yes	No
commerce	Yes	No	No	No

purchase (noun)	commerce (noun)
the acquisition of something for payment	transactions (sales and purchases) having the objective of supplying commodities (goods and services)
the mechanical advantage gained by being in a position to use a lever	social exchange, especially of opinions, attitudes, etc.
a means of exerting influence or gaining advantage
something acquired by purchase

purchase (verb)	commerce (verb)
obtain by purchase; acquire by means of a financial transaction