celeriac vs Apium graveolens rapaceum

celeriac and Apium graveolens rapaceum both are nouns.

Word	Noun	Adjective	Verb	Adverb
celeriac	Yes	No	No	No
Apium graveolens rapaceum	Yes	No	No	No

As nouns, celeriac and Apium graveolens rapaceum are synonyms defined as:

celeriac and Apium graveolens rapaceum: grown for its thickened edible aromatic root

Other synonyms of celeriac include celery root, knob celery, root celery, turnip-rooted celery.

celeriac (noun)	Apium graveolens rapaceum (noun)
thickened edible aromatic root of a variety of celery plant	grown for its thickened edible aromatic root
grown for its thickened edible aromatic root