There are 14 9-letter words that start with 'cir'.
| circadian | circinate | circuital | 
| circuited | circuitry | circulars | 
| circulate | cirrhosed | cirrhoses | 
| cirrhosis | cirrhotic | cirriform | 
| cirripede | cirripeds | |
Note: These 14 9-letter words that start with 'cir' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with circ, cirr, cire, cirq, cirs.
4-letter words start with 'cir' (1)