geminate
1. [ noun ] (linguistics,phonetics) a doubled or long consonant
Examples:

"the `n' in `thinness' is a geminate"

Related terms: consonant
2. [ verb ] arrange in pairs
Synonyms: pair
Examples:

"Pair these numbers"

Related terms: arrange couple
3. [ verb ] occur in pairs
Synonyms: pair
Related terms: occur
4. [ verb ] form by reduplication
Synonyms: reduplicate
Examples:

"The consonant reduplicates after a short vowel" "The morpheme can be reduplicated to emphasize the meaning of the word"

Related terms: duplicate linguistics
5. [ verb ] arrange or combine in pairs
Examples:

"The consonants are geminated in these words"

Related terms: double gemination
Similar spelling:   gemination