water-mint vs Mentha aquatica

water-mint and Mentha aquatica both are nouns.

Word	Noun	Adjective	Verb	Adverb
water-mint	Yes	No	No	No
Mentha aquatica	Yes	No	No	No

As nouns, water-mint and Mentha aquatica are synonyms defined as:

water-mint and Mentha aquatica: a European mint that thrives in wet places; has a perfume like that of the bergamot orange; naturalized in eastern North America

Other synonyms of water-mint include water mint.

water-mint (noun)	Mentha aquatica (noun)
a European mint that thrives in wet places; has a perfume like that of the bergamot orange; naturalized in eastern North America	a European mint that thrives in wet places; has a perfume like that of the bergamot orange; naturalized in eastern North America