Is “Matchlock” a Scrabble word?
Yes
MATCHLOCK
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 Matchlock
/ˈmatʃlɒk/
noun
1.Early type of firearm, using a smoldering piece of cord to fire the powder in the firing pan.
2.The gunlock used in such a weapon, having a slow smouldering match, see: slow match.