Is “Miler” a Scrabble word?
Yes
MILER
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Miler
/ˈmaɪləɹ/
noun
1.(often in combination) An athlete or a horse who specializes in running races of one mile, or a specified number of miles.
2.(in combination) A race whose length is the specified number of miles.
“I ran an eight-miler on Sunday and I'm still feeling sore.”