match·board 
(măchbôrd′)
(măchbôrd′)n.
A board cut with a tongue on one side and a matching groove on the other to fit with similarly cut boards.
- immortalize
- immortally
- immortelle
- immotile
- immotility
- immovability
- immovable
- immovable feast
- immovableness
- immovably
- immune
- immune globulin
- immune reaction
- immune response
- immune serum globulin
- immune system
- immunity
- immunization
- immunize
- immuno-
- immunoassay
- immunoblot
- immunochemical
- immunochemically
- immunochemistry