sell vs buy

sell and buy both are nouns.

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

sell (noun)	buy (noun)
the activity of persuading someone to buy	an advantageous purchase

sell (verb)	buy (verb)
persuade somebody to accept something	accept as true
exchange or deliver for money or its equivalent	obtain by purchase; acquire by means of a financial transaction
do business; offer for sale as for one's livelihood	make illegal payments to in exchange for favors or influence
give up for a price or reward	acquire by trade or sacrifice or exchange
deliver to an enemy by treachery	be worth or be capable of buying
be sold at a certain price or in a certain way
be responsible for the sale of
be approved of or gain acceptance