elm vs genus Ulmus

elm and genus Ulmus both are nouns.

Word	Noun	Adjective	Verb	Adverb
elm	Yes	No	No	No
genus Ulmus	Yes	No	No	No

elm (noun)	genus Ulmus (noun)
any of various trees of the genus Ulmus: important timber or shade trees	type genus of family Ulmaceae; deciduous trees having simple serrate leaves; widely distributed in temperate regions
hard tough wood of an elm tree; used for e.g. implements and furniture