hardcore is a valid English word

Scrabble validity: valid ( international - Sowpods, US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

Meanings

Adjective (COMPARABLE)

Having an extreme dedication to a certain activity.
• Synonym: diehard, steely-eyed, tough as nails, gung ho
(colloquial) Particularly intense; thrillingly dangerous or erratic; desirably violent in appearance; pleasing or "cool" due to intensity or danger.
• That show was hardcore, dude.
Resistant to change.

Noun (UNCOUNTABLE)

Broken bricks, stone and/or other aggregate used as foundations, especially in road and path laying.
Several music genres, including:

hardcore is a Scrabble valid word

hardcore

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 00 points

hardcore is an iScramble, QuickWords valid word

hardcore

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 00 points

Same letters words (Anagrams)

• none

Same letters plus one

• HANDCORER
• HARDCOVER
• HOVERCARD
• ORCHARDER

Same letters minus one

• CERRADO
• CHARRED
• CHORRED
• CORRADE
• DARROCH
• DECORAH
• DEROACH
• HOARDER
• ORCHARD
• ROACHED