horse-trade vs horse trading

horse-trade is not a noun while horse trading is a noun.

Word	Noun	Adjective	Verb	Adverb
horse-trade	No	No	Yes	No
horse trading	Yes	No	No	No

horse-trade (noun)	horse trading (noun)
	the swapping of horses (accompanied by much bargaining)
	negotiation accompanied by mutual concessions and shrewd bargaining

horse-trade (verb)	horse trading (verb)
negotiate with much give and take