The Avestan word paṇca
Word paṇca
Meaning five, 5
See also Phrygian: ΠΙΝΚΕ ‘five’
Greek: πέντε ‘five’
Proto-Indo-European: *pénkʷe ‘five’
Mitanni: panza ‘five’
Tocharian A: päñ ‘five’

Other words that might be of interest
aēuua ‘one’, ašta ‘eight, 8’, xšuuaš ‘six, 6’, θritiia- ‘third’, paoiriia- ‘first’, bitiia- ‘second’, hapta ‘seven, 7’, caθβarasca ‘four’