paragoge

1. The addition of a lettter or syllable to the end of a word. A kind of metaplasm. (Silva Rhetoricae)

2. Production, or lengthening: a figure when a letter or syllable is added to the end of a word.; Paragoge productio, a making long. Paragoge is a figure when a letter or syllable is added to the end of a word. (JG Smith)

3. Annexation, or Paragoge, the contrast to end-cut, is the putting of a letter or letters to the end of a word, as withouten for without. (Macbeth)

4. A Paragoge adds unto the end; Yet, not the sense, but measure to amend. (Holmes)

1. Addition of a final letter:
In Love's Labour's Lost Holofernes parodies this figure. Both "sore" and "sorel" named kinds of deer. By adding an "L" [= 50 in Roman numerals] through paragoge, he makes "50" deer:
If sore be sore, then L to sore makes fifty sores o' sorel
—Shakespeare, Love's Labour's Lost 4.2.59-61

Addition of a final syllable:
When "slack" becomes "slacken" without any change of meaning. (Silva Rhetoricae)

3. In Milton's supremely beautiful word "eremite," for hermit, he deftly gives us in one fine creation an aphaeresis, a paragoge, and an epenthesis: a front-cut of the h; an insertion in the second e; an annexation in the final e. (Macbeth)

3. Sir John Suckling, a poet very minor indeed, was ridiculed as follows by a contemporary knight, Sir John Mennis, wherein annexation lubricates the fun:

"Sir John he got him an ambling nag,
To Scotland for to ride-a,
With a hundred men, all his own he swore,
To guard him on every side-a." (Macbeth)

4. Chicken, for chick. (Holmes)