geminate vs double

geminate and double both are nouns.

Word	Noun	Adjective	Verb	Adverb
geminate	Yes	No	Yes	No
double	Yes	Yes	Yes	Yes

As verbs, double is a hypernym of geminate; that is, double is a word with a broader meaning than geminate:

Other hypernyms of geminate include duplicate.

As verbs, double is a hypernym of geminate; that is, double is a word with a broader meaning than geminate:

Other hypernyms of geminate include duplicate, reduplicate, repeat, replicate.

geminate (noun)	double (noun)
a doubled or long consonant	a base hit on which the batter stops safely at second base
	raising the stakes in a card game by a factor of 2
	a quantity that is twice as great as another
	someone who closely resembles a famous person (especially an actor)
	a stand-in for movie stars to perform dangerous stunts

geminate (adjective)	double (adjective)
	used of homologous chromosomes associated in pairs in synapsis
	used of flowers having more than the usual number of petals in crowded or overlapping arrangements
	having two meanings with intent to deceive
	large enough for two
	twice as great or many
	consisting of or involving two parts or components usually in pairs
	having more than one decidedly dissimilar aspects or qualities

geminate (verb)	double (verb)
arrange or combine in pairs	increase twofold
arrange in pairs	hit a two-base hit
occur in pairs	do double duty; serve two purposes or have two functions
form by reduplication	make or do or perform again
	bend over or curl up, usually with laughter or pain
	make a demand for (a card or suit)