There are 9 12-letter words that end with 'idal'.
| bactericidal | amygdaloidal | hemorrhoidal |
| epicycloidal | infanticidal | insecticidal |
| nonsteroidal | saccharoidal | paraboloidal |
Note: These 9 12-letter words that end with 'idal' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with oidal, cidal, tidal, midal, nidal, sidal, bidal, didal, pidal, ridal, uidal.
5-letter words end with 'idal' (2)