Paragoge
Paragoge (par`ȧ*gō"je) , noun
[Latin, from Greek paragwgh`, from para`gein to lead beside, protract; para` beside + 'a`gein to lead.]
1.
(Grammar) The addition of a letter or syllable to the end of a word, as withouten for without.
2.
(Medicine) Coaptation. [Obsolete] — Dunglison