Merriam-Webster's Official Scrabble Players Dictionary includes the 7 letter words imarets (a Turkish inn) and maestri (a master of an art). It also includes the 7 letter words misrate (to rate incorrectly) and smartie (smarty).
Words I can make with the letter is the word 'terror' are:errerrorororeretroroerotrotetotoetore
34 words (not including single letter words)
--- 29 words ---7 Letter wordspenguin5 Letter Wordsennuiequippennipiqueunpenunpin4 Letter Wordsninepeinpinequinquip3 Letter Wordsinnnipnunpenpiepinpiupun2 Letter Wordseninnenupepiqiun
kitchen
--- 58 words ---7 Letter Wordsharvast6 Letter Wordsarhats5 Letter Wordsarhatavasthaarshartstahrstrashvaras4 Letter Wordsaahsartshaarharthasthatsrashrathratsshatstartahrtarstavstsarvaravarsvasavastvats3 Letter Wordsaahaasahaahsarsartashavahashatrahrasratsatshatartastavvarvasvat2 Letter Wordsaaaharasathashta
300,000
Artemis is not a English word, it is Greek, there are many such words influenced by Greeks who were passed on into the Latin of the Romans.
Words that can be made from the letter is 'with' are:hihitIitwit
133 words
Words I can make with the letter is the word 'terror' are:errerrorororeretroroerotrotetotoetore
34 words (not including single letter words)
a lot
Words that can be made from the letter in meal are:aalealmamlamlamemaleme
abbeabedacedbabebadebeadbeefcafecaffcecacededacedeaddeafdeedfacefadefafffeeddecade
Three letter words that can be made with the letters 'bingo' are:bigbinboggingobionnibobi
--- 29 words ---7 Letter wordspenguin5 Letter Wordsennuiequippennipiqueunpenunpin4 Letter Wordsninepeinpinequinquip3 Letter Wordsinnnipnunpenpiepinpiupun2 Letter Wordseninnenupepiqiun
kitchen