Antemural :: Antemural (n.) An outwork of a strong, high wall, with turrets, in front of the gateway (as of an old castle), for defending the entrance..
Extramural :: Extramural (a.) Outside of the walls, as of a fortified or walled city..
Intermural :: Intermural (a.) Lying between walls; inclosed by walls.
Intramural :: Intramural (a.) Being within the walls, as of a city..
Intramural :: Intramural (a.) Being within the substance of the walls of an organ; as, intramural pregnancy..
Muraena :: Muraena (n.) A genus of large eels of the family Miraenidae. They differ from the common eel in lacking pectoral fins and in having the dorsal and anal fins continuous. The murry (Muraena Helenae) of Southern Europe was the muraena of the Romans. It is highly valued as a food fish.