Apium graveolens rapaceum vs knob celery

Apium graveolens rapaceum and knob celery both are nouns.

Word	Noun	Adjective	Verb	Adverb
Apium graveolens rapaceum	Yes	No	No	No
knob celery	Yes	No	No	No

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

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

Other synonyms of Apium graveolens rapaceum include celeriac, celery root, root celery, turnip-rooted celery.

Apium graveolens rapaceum (noun)	knob celery (noun)
grown for its thickened edible aromatic root	grown for its thickened edible aromatic root