The Avestan word huuar-
Word huuar-
Meaning sun
See also Proto-Indo-European: *séhₐul ‘sun’
Synonyms hvarə

Other words that might be of interest
təmah- ‘darkness’, axšaēna ‘black, dark’, ātar- ‘fire’, raocah- ‘light’, māh- ‘moon’, asman- ‘stone, sky’, snaēžā ‘snow’, star- ‘star’