There are 566 10-letter words that start with 'de'.
Note: These 566 10-letter words that start with 'de' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with dec, des, def, dem, dep, del, det, den, dea, dev, der, deb, deg, dee, dei, dew, deh, deo, deu, ded, dex, dek, dej, dez, dey.
3-letter words start with 'de' (9)