As nouns the difference between metacism and etacism
is that metacism is a defect in pronouncing the letter m, or excessive use of it while etacism is (grammar) the pronunciation of the greek eta like the italian long e, or the vowel in the english word (ate).
metacism
English
Noun
(
en-noun)
A defect in pronouncing the letter M, or excessive use of it.
(
Webster 1913)
etacism
English
Noun
(
en-noun)
(grammar) The pronunciation of the Greek eta like the Italian long e, or the vowel in the English word (ate).
(
Webster 1913)