Nouns

(n)geminatea doubled or long consonant“the ‘n’ in ‘thinness’ is a geminate”

Verbs

(v)reduplicate, geminateform by reduplication“The consonant reduplicates after a short vowel”, “The morpheme can be reduplicated to emphasize the meaning of the word”
(v)pair, geminateoccur in pairs
(v)pair, geminatearrange in pairs“Pair these numbers”
(v)geminatearrange or combine in pairs“The consonants are geminated in these words”