As a verb alter
is to change the form or structure of.
As a noun chang is
(often|italicized) a traditional harp of central and southwest asia.
Other Comparisons: What's the difference?
* altre (obsolete)
To change the form or structure of.
* Bible, Psalms lxxxix. 34
- My covenant will I not break, nor alter the thing that is gone out of my lips.
* Alexander Pope
- No power in Venice can alter a decree.
To become different.
To tailor clothes to make them fit.
To castrate, neuter or spay (a dog or other animal).
(obsolete) To agitate; to affect mentally.
- It gilds all objects, but it alters none.
(often, italicized) A traditional harp of central and southwest Asia