gin rummy vs knock rummy

gin rummy and knock rummy both are nouns.

Word	Noun	Adjective	Verb	Adverb
gin rummy	Yes	No	No	No
knock rummy	Yes	No	No	No

As nouns, gin rummy and knock rummy are synonyms defined as:

gin rummy and knock rummy: a form of rummy in which a player can go out if the cards remaining in their hand total less than 10 points

Other synonyms of gin rummy include gin.

gin rummy (noun)	knock rummy (noun)
a form of rummy in which a player can go out if the cards remaining in their hand total less than 10 points	a form of rummy in which a player can go out if the cards remaining in their hand total less than 10 points