common hops vs common hop

common hops and common hop both are nouns.

Word	Noun	Adjective	Verb	Adverb
common hops	Yes	No	No	No
common hop	Yes	No	No	No

As nouns, common hops and common hop are synonyms defined as:

common hops and common hop: European twining plant whose flowers are used chiefly to flavor malt liquors; cultivated in America

Other synonyms of common hops include bine, European hop, Humulus lupulus.

common hops (noun)	common hop (noun)
European twining plant whose flowers are used chiefly to flavor malt liquors; cultivated in America	European twining plant whose flowers are used chiefly to flavor malt liquors; cultivated in America