travel bargain vs buy

travel bargain and buy both are nouns.

Word	Noun	Adjective	Verb	Adverb
travel bargain	Yes	No	No	No
buy	Yes	No	Yes	No

As nouns, buy is a hypernym of travel bargain; that is, buy is a word with a broader meaning than travel bargain:

travel bargain: a bargain rate for travellers on commercial routes (usually air routes)
buy: an advantageous purchase

Other hypernyms of travel bargain include bargain, steal.

travel bargain (noun)	buy (noun)
a bargain rate for travellers on commercial routes (usually air routes)	an advantageous purchase

travel bargain (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