There are 7 12-letter words that start with 'bas'.
| basementless | baserunnings | basidiospore |
| basification | bastardising | bastardizing |
| bastinadoing | ||
Note: These 7 12-letter words that start with 'bas' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with basi, bast, base, bass, bask, bash, basa, baso, basc, basm, basq.
4-letter words start with 'bas' (5)