There are 21 words that start with 'dad'.
dad | dada | dado |
dads | dadas | daddy |
dados | daddle | dadgum |
dadoed | dadoes | dadaism |
dadaist | daddies | daddled |
daddles | dadoing | dadaisms |
dadaists | daddling | dadaistic |
Note: These 21 words that start with 'dad' are found from the USA & Canada version of the tournament Scrabble word list.