bullace vs damson plum

bullace and damson plum both are nouns.

Word	Noun	Adjective	Verb	Adverb
bullace	Yes	No	No	No
damson plum	Yes	No	No	No

As nouns, damson plum is a hyponym of bullace; that is, damson plum is a word with a more specific, narrower meaning than bullace:

bullace: small wild or half-domesticated Eurasian plum bearing small ovoid fruit in clusters
damson plum: plum tree long cultivated for its edible fruit

Other hyponyms of bullace include damson plum tree, Prunus domestica insititia.

bullace (noun)	damson plum (noun)
small wild or half-domesticated Eurasian plum bearing small ovoid fruit in clusters	dark purple plum of the damson tree
	plum tree long cultivated for its edible fruit
	tropical American timber tree with dark hard heavy wood and small plumlike purple fruit