genus Corylus vs Corylus

genus Corylus and Corylus both are nouns.

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

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

genus Corylus and Corylus: deciduous monoecious nut-bearing shrubs of small trees: hazel; sometimes placed in the subfamily or family Corylaceae

genus Corylus (noun)	Corylus (noun)
deciduous monoecious nut-bearing shrubs of small trees: hazel; sometimes placed in the subfamily or family Corylaceae	deciduous monoecious nut-bearing shrubs of small trees: hazel; sometimes placed in the subfamily or family Corylaceae