short whist vs hearts

short whist and hearts both are nouns.

Word	Noun	Adjective	Verb	Adverb
short whist	Yes	No	No	No
hearts	Yes	No	No	No

As nouns, hearts is a hyponym of short whist; that is, hearts is a word with a more specific, narrower meaning than short whist:

short whist: a card game for four players who form two partnerships; a pack of 52 cards is dealt and each side scores one point for each trick it takes in excess of six
hearts: a form of whist in which players avoid winning tricks containing hearts or the queen of spades

Other hyponyms of short whist include dummy whist, Black Maria.

short whist (noun)	hearts (noun)
a card game for four players who form two partnerships; a pack of 52 cards is dealt and each side scores one point for each trick it takes in excess of six	a form of whist in which players avoid winning tricks containing hearts or the queen of spades