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"evaluator" is also used as a crossword clue. If that's what you saw, the answer is often rater (5 letters).
Definitions
an authority who is able to estimate worth or quality
Word origin
From evaluate + -or.
Used in a sentence
“They were asked to program an expression evaluator that could determine the value of a numeric expression.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Appraiser”9 letters
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