There are 28 11-letter words that start with 'er'.
Note: These 28 11-letter words that start with 'er' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ero, ere, erg, ery, err, era, eru, eri, ers, ern, erm, erb, erl, erv.
3-letter words start with 'er' (6)