Actually amphoteric is correct. Minor Scale does not work. I mean some of these work but its a crossword book so I guess I should say they weren't the selected answer. So the last one
MILERANCOS
I thought it would be Coal Miners that was the best answer, but such luck :(
Its not a crossword, its a Math Word Puzzle where it is a division problem where the letters are substituted by numbers. It would have been to confusing to explain that.
Goodness, icauser…..it would in fact have been far simpler to have explained that (as you did just now ! ) rather than tell us that it was from "a crossword book", as you did in post 11.
At least we could then have understood why some answers offered could not be correct!