There are 9 5-letter words that start with 'bir'.
birch | birds | birks | birle | birls |
biros | birrs | birse | birth | |
Note: These 9 5-letter words that start with 'bir' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with bird, birt, birl, bira, bire, birr, birc, birk, biri, biro, birs, biry.
4-letter words start with 'bir' (5)