you forgot homograph. The way is breaks down is something like this
graph - same spelling, but different (lead (to guide) lead (Pb))
phone - same sound (hare, hair)
nym - words that fit in both. (bear, bare (to uncover) bear (to carry))
thats the best I understand it. I think the nym is becoming a catchall, and graph is slowing fading away.













Bookmarks