Focusing on the "change" as a noun meaning "money"
* change (pronounced "chaynj") - the money returned after a purchase
* change (pronounced "cheynj") - to make a difference, to alter
Focusing on "change" as a verb meaning "to alter"
* change (pronounced "cheynj") - to make a difference, to alter
* change (pronounced "chaynj") - the money returned after a purchase
Similar words with different spellings
* chance - a possibility, an opportunity
* chant - to sing rhythmically
Note: It's worth pointing out that "change" is a very common word, so it's more likely to have *synonyms* than *homographs*. Some synonyms for "change" include:
* alter
* modify
* transform
* convert
* adjust
* vary
* evolve
Do any of these options work for your purpose?