celery root vs root celery

celery root and root celery both are nouns.

Word	Noun	Adjective	Verb	Adverb
celery root	Yes	No	No	No
root celery	Yes	No	No	No

As nouns, celery root and root celery are synonyms defined as:

celery root and root celery: grown for its thickened edible aromatic root

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

celery root (noun)	root celery (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