swap vs horse trading

swap and horse trading both are nouns.

Word	Noun	Adjective	Verb	Adverb
swap	Yes	No	Yes	No
horse trading	Yes	No	No	No

As nouns, horse trading is a hyponym of swap; that is, horse trading is a word with a more specific, narrower meaning than swap:

Other hyponyms of swap include horse trade.

swap (noun)	horse trading (noun)
an equal exchange	the swapping of horses (accompanied by much bargaining)
	negotiation accompanied by mutual concessions and shrewd bargaining

swap (verb)	horse trading (verb)
move (a piece of a program) into memory, in computer science
exchange or give (something) in exchange for