Paeonia vs genus Paeonia

Paeonia and genus Paeonia both are nouns.

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

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

Paeonia and genus Paeonia: peonies: herbaceous or shrubby plants having showy flowers

Paeonia (noun)	genus Paeonia (noun)
peonies: herbaceous or shrubby plants having showy flowers	peonies: herbaceous or shrubby plants having showy flowers