Euler diagram of choice semantic relations.
Nyms (with category [cat] if any)
Noun (cat) Sound Spelling Meaning phone/graph
homonym same same different homophone & homograph
heteronym (cat) different same different homograph & heterophone
homophone same different different homophone (cat) & heterograph
heterograph different same same heterophone & homograph
synonym different different same heterograph & heterophone
alternative spelling same different same heterograph & homophone
identical same same same homograph & homophone
distinct different different different heterograph & heterophone