- maarA broad volcanic crater, usually filled with water to form a lake.
- cormorantAny of various medium-large black seabirds of the family Phalacrocoracidae which dive into water for fish and other aquatic animals, found throughout the world except for islands in the centre of the Pacific Ocean; specifically, the great cormorant (Phalacrocorax carbo).
- marinateTo allow a sauce or flavoring mixture to absorb into something; to steep or soak something in a marinade to flavor or prepare it for cooking.
- Kraken MareThe largest of the methane lakes on the surface of Saturn’s moon, Titan.
- marigenousProduced in or by the sea.
- marigraphA device used to measure tidal levels.
- marographAn instrument for measuring the tides.