There are 16 10-letter words that start with 'pac'.
| pacemakers | pacemaking | pacesetter | 
| pachyderms | pachytenes | pacifiable | 
| pacificism | pacificist | pacifistic | 
| packagings | packboards | packhorses | 
| packnesses | packsaddle | packthread | 
| paclitaxel | ||
Note: These 16 10-letter words that start with 'pac' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with pack, paci, pach, pace, pact, paca, pacl, pacs, pacy.
4-letter words start with 'pac' (6)