There are 141 13-letter words that start with 'an'.
Note: These 141 13-letter words that start with 'an' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ant, ana, ang, ani, ann, ano, ane, anc, and, ank, any, ans, anu, anh, anv, anx, anl, anf.
3-letter words start with 'an' (6)