7-Letter Words Starting O & Ending UM

• most favorable conditions or greatest degree or amount possible under given circumstances

• most desirable possible under a restriction expressed or implied

• small furry Australian arboreal marsupials having long usually prehensile tails

• nocturnal arboreal marsupial having a naked prehensile tail found from southern North America to northern South America

• a fold of peritoneum supporting the viscera

• A small opening or orifice.

• One of the suckers on the head of a tapeworm.

• The main opening in a sponge from which water is expelled.

• A type of medieval polyphony which builds upon an existing plainsong.

• A method by which philosophical or scientific investigation may be conducted.

• A biting fly of the genus Oestrus; a botfly.

• A bite or sting.

• A passion or frenzy.

• A female animal's readiness to mate; heat, rut.