There are 74 9-letter words that start with 'inter'.
Note: These 74 9-letter words that start with 'inter' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with interc, interp, interl, interm, inters, interf, interr, intern, interd, interv, intert, interi, intera, interg, interb, interj, intere, interw, intero, interk, interu, interz.
6-letter words start with 'inter' (2)