Is “Diehard” a Scrabble word?
Yes
DIEHARD
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 Diehard
noun
1.A person with such an attitude.
adjective
1.Unreasonably or stubbornly resisting change.
2.Fanatically opposing progress or reform.
3.Complete; having no opposite opinion of anything in a particular topic of one's values; thorough of in one's beliefs.
“For a Roman Catholic teacher, he sure is a diehard fundamentalist.”