Altar: /’ɔ:ltə, ‘ɒl-/ (noun) a table used in religious ceremonies
The priest conducted the ceremony at the altar.”
Alter: /’ɔ:ltə, ‘ɒl-/ (verb) change, modify
Don’t alter a thing; leave everything as it is.
Altar: محراب، میز مراسم مذهبی کلیسا
Alter: تغییردادن، اصلاح کردن