Leguminosae vs Fabaceae

Leguminosae and Fabaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Leguminosae	Yes	No	No	No
Fabaceae	Yes	No	No	No

As nouns, Leguminosae and Fabaceae are synonyms defined as:

Leguminosae and Fabaceae: a large family of trees, shrubs, vines, and herbs bearing bean pods; divided for convenience into the subfamilies Caesalpiniaceae, Mimosaceae, Papilionaceae

Other synonyms of Leguminosae include family Fabaceae, family Leguminosae, legume family, pea family.

Leguminosae (noun)	Fabaceae (noun)
a large family of trees, shrubs, vines, and herbs bearing bean pods; divided for convenience into the subfamilies Caesalpiniaceae, Mimosaceae, Papilionaceae	a large family of trees, shrubs, vines, and herbs bearing bean pods; divided for convenience into the subfamilies Caesalpiniaceae, Mimosaceae, Papilionaceae