There are 16 10-letter words that start with 'act'.
| actability | actinolite | actionable |
| actionably | actionless | activating |
| activation | activators | activeness |
| activistic | activities | activizing |
| actomyosin | actualized | actualizes |
| actuations | ||
Note: These 16 10-letter words that start with 'act' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with acti, actu, acto, acta, actr, acte, acts.
4-letter words start with 'act' (2)