oat vs plural form

oat and plural form both are nouns.

Word	Noun	Adjective	Verb	Adverb
oat	Yes	No	No	No
plural form	Yes	No	No	No

oat (noun)	plural form (noun)
seed of the annual grass Avena sativa (spoken of primarily in the plural as `oats')	the form of a word that is used to denote more than one
annual grass of Europe and North Africa; grains used as food and fodder (referred to primarily in the plural: `oats')