chess vs bromegrass

chess and bromegrass both are nouns.

Word	Noun	Adjective	Verb	Adverb
chess	Yes	No	No	No
bromegrass	Yes	No	No	No

As nouns, bromegrass is a hypernym of chess; that is, bromegrass is a word with a broader meaning than chess:

chess: weedy annual native to Europe but widely distributed as a weed especially in wheat
bromegrass: any of various woodland and meadow grasses of the genus Bromus; native to temperate regions

Other hypernyms of chess include brome.

chess (noun)	bromegrass (noun)
a board game for two players who move their 16 pieces according to specific rules; the object is to checkmate the opponent's king	any of various woodland and meadow grasses of the genus Bromus; native to temperate regions
weedy annual native to Europe but widely distributed as a weed especially in wheat