Scotch gale vs sweet gale

Scotch gale and sweet gale both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scotch gale	Yes	No	No	No
sweet gale	Yes	No	No	No

As nouns, Scotch gale and sweet gale are synonyms defined as:

Scotch gale and sweet gale: bog shrub of north temperate zone having bitter-tasting fragrant leaves

Other synonyms of Scotch gale include Myrica gale.

Scotch gale (noun)	sweet gale (noun)
bog shrub of north temperate zone having bitter-tasting fragrant leaves	bog shrub of north temperate zone having bitter-tasting fragrant leaves