There are 14 6-letter words that start with 'sig'.
| sighed | sigher | sights | sigils | sigloi | 
| siglos | siglum | sigmas | signal | signed | 
| signee | signer | signet | signor | |
Note: These 14 6-letter words that start with 'sig' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with sign, sigh, sigm, sigl, siga, sigi.
4-letter words start with 'sig' (2)