commerce vs buy

commerce and buy both are nouns.

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

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

commerce (verb)	buy (verb)
	accept as true
	obtain by purchase; acquire by means of a financial transaction
	make illegal payments to in exchange for favors or influence
	acquire by trade or sacrifice or exchange
	be worth or be capable of buying