What's the difference between ecthlipsis and metaplasm?

Ecthlipsis

---

Definition:

• (n.) The dropping out or suppression from a word of a consonant, with or without a vowel.
• (n.) The elision of a final m, with the preceding vowel, before a word beginning with a vowel.

Example Sentences:

Metaplasm

---

Definition:

• (n.) A change in the letters or syllables of a word.

Example Sentences: