Wrong.
A five letter word for a scientists mistake is "error."
error
error Fault
error
"error"
eager, ester, error
eager, ester, error
The five-letter word with three 'R's is "error." It fits the criteria by having three occurrences of the letter 'R' and consists of a total of five letters.
A four letter word for error can be slip.
A five letter word for bravery is valor.
A five letter word for a game is "match."
Scarf is a five letter word for muffler.