There are 20 words that start with 'smart'.
| smart | smarts | smarty |
| smarted | smarten | smarter |
| smartie | smartly | smartass |
| smartens | smartest | smarties |
| smarting | smartened | smartness |
| smartweed | smartasses | smartening |
| smartweeds | smartnesses | |
Note: These 20 words that start with 'smart' are found from the USA & Canada version of the tournament Scrabble word list.