What is the highest scoring Scrabble word that does not use premium squares?
It depends.
In the absence of multiple words to be formed on an existing
word on the scrabble board, that word has to be at least, a four
letter word (no blank tiles) where the first letter is given (on
the scrabble board) adding to that letter are combination of one
and/or two ten points letter tiles and one and/or two one point
letter tiles which are vowels.
Or, could be: on the fifth grid, a seven letter word (no blank
tiles) where the first word is a two letter word, and is given (on
the scrabble board) and adding to that word are combination of two
ten points letter tiles and three one point letter tiles which are
vowels; or, a six letter word (no blank tiles) where the first
letter is given (on the scrabble board) adding to that letter are
combination of one and/or two ten points letter tiles and one
and/or two and/or three one point letter tiles which are
vowels.