There are 12 words that start with 'firew'.
| firewall | fireweed | firewood |
| firework | fireworm | firewalls |
| firewater | fireweeds | firewoods |
| fireworks | fireworms | firewaters |
Note: These 12 words that start with 'firew' are found from the USA & Canada version of the tournament Scrabble word list.