As nouns the difference between grapheme and graphone
is that grapheme is while graphone is (physics) a partially hydrogenated form of graphene that is ferromagnetic.
grapheme
English
Noun
(
en noun)
A fundamental unit of a writing system, corresponding to (for example) letters in the English alphabet or jamo in Korean Hangeul.
In alphabetic writing, the shortest group of letters composing a phoneme.
graphone
English
Noun
(
en noun)
(physics) A partially hydrogenated form of graphene that is ferromagnetic
(linguistics) A combination of grapheme and phoneme