double vs geminate

double and geminate both are nouns.

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

As verbs, geminate is a hyponym of double; that is, geminate is a word with a more specific, narrower meaning than double:

Other hyponyms of double include redouble.

As verbs, geminate is a hyponym of double; that is, geminate is a word with a more specific, narrower meaning than double:

Other hyponyms of double include copy, replicate, recapitulate, reduplicate.

double (noun)	geminate (noun)
a base hit on which the batter stops safely at second base	a doubled or long consonant
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

double (adjective)	geminate (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

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