Zingiber officinale vs common ginger

Zingiber officinale and common ginger both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zingiber officinale	Yes	No	No	No
common ginger	Yes	No	No	No

As nouns, Zingiber officinale and common ginger are synonyms defined as:

Zingiber officinale and common ginger: tropical Asian plant widely cultivated for its pungent root; source of gingerroot and powdered ginger

Other synonyms of Zingiber officinale include Canton ginger, stem ginger.

Zingiber officinale (noun)	common ginger (noun)
tropical Asian plant widely cultivated for its pungent root; source of gingerroot and powdered ginger	tropical Asian plant widely cultivated for its pungent root; source of gingerroot and powdered ginger