Is “Vulcanize” a Scrabble word?
Yes
VULCANIZE
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 Vulcanize
/ˈvʌlkənaɪz/
verb
1.To treat rubber with heat and (usually) sulphur to harden it and make it more durable.
2.To undergo such treatment.