stem ginger vs Zingiber officinale

stem ginger and Zingiber officinale both are nouns.

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

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

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

Other synonyms of stem ginger include Canton ginger, common ginger.

stem ginger (noun)	Zingiber officinale (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