Ulmus vs genus Ulmus

Ulmus and genus Ulmus both are nouns.

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

As nouns, Ulmus and genus Ulmus are synonyms defined as:

Ulmus and genus Ulmus: type genus of family Ulmaceae; deciduous trees having simple serrate leaves; widely distributed in temperate regions

Ulmus (noun)	genus Ulmus (noun)
type genus of family Ulmaceae; deciduous trees having simple serrate leaves; widely distributed in temperate regions	type genus of family Ulmaceae; deciduous trees having simple serrate leaves; widely distributed in temperate regions