8-Letter Words Starting O & Ending A

• back part of the head or skull

• A covering flap in animals, such as a gill cover.

• The lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal of spores or seeds.

• A gum flap covering (part of) a partially erupted tooth, usually a wisdom tooth.

• A structure which serves as a cover or lid.

• An opuscule; a short work.

• swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities

• a short amusing opera

• abnormally small production of urine; can be a symptom of kidney disease or obstruction of the urinary tract or edema or an imbalance of fluids and electrolytes in the body

• production of an abnormally small amount of urine