I am trying to draw a diagram to show relationship between these terms but I am not sure what is correct position of them is diagram. Can you please help to do that?
What is relation of following term (is-a, has-one, has-many, is-consist-of, is-a-type-of, ...):
morpheme, word, phoneme, phone, allophone, allomorph, grapheme, glyph, allograph, letter, (and any other missed related term)
is-a
and others are rather mathematical terms, so it is important to know how you are using them. So if you don't mind sharing what you have so far, I believe more people would be glad to improve it. Others (like me) may wish to learn from your diagram as well.