There are 17 words that start with 'behav'.
| behave | behaved |
| behaver | behaves |
| behavers | behaving |
| behavior | behaviors |
| behaviour | behavioral |
| behaviours | behaviorism |
| behaviorist | behaviorally |
| behaviorisms | behaviorists |
| behavioristic | |
Note: These 17 words that start with 'behav' are found from the USA & Canada version of the tournament Scrabble word list.