There are 41 13-letter words that start with 'comp'.
Note: These 41 13-letter words that start with 'comp' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with compl, compa, compe, compu, compo, compr, compi, compt, comps.
5-letter words start with 'comp' (3)