short covering vs trading

short covering and trading both are nouns.

Word	Noun	Adjective	Verb	Adverb
short covering	Yes	No	No	No
trading	Yes	No	No	No

As nouns, trading is a hypernym of short covering; that is, trading is a word with a broader meaning than short covering:

short covering: the purchase of securities or commodities by a short seller to close out a short sale
trading: buying or selling securities or commodities

short covering (noun)	trading (noun)
the purchase of securities or commodities by a short seller to close out a short sale	buying or selling securities or commodities