Holland gin vs Hollands

Holland gin and Hollands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Holland gin	Yes	No	No	No
Hollands	Yes	No	No	No

As nouns, Holland gin and Hollands are synonyms defined as:

Other synonyms of Holland gin include geneva.

Holland gin (noun)	Hollands (noun)
gin made in the Netherlands	gin made in the Netherlands