oat vs genus Avena

oat and genus Avena both are nouns.

Word	Noun	Adjective	Verb	Adverb
oat	Yes	No	No	No
genus Avena	Yes	No	No	No

oat (noun)	genus Avena (noun)
seed of the annual grass Avena sativa (spoken of primarily in the plural as `oats')	oats
annual grass of Europe and North Africa; grains used as food and fodder (referred to primarily in the plural: `oats')