15-Letter Words Containing: O,R,E,S,T,R,Y

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• an overactive thyroid gland; pathologically excessive production of thyroid hormones or the condition resulting from excessive production of thyroid hormones

• a stabilizer consisting of a heavy gyroscope that spins on a vertical axis; reduces side-to-side rolling of a ship or plane

• the branch of chemistry that studies the relation between chemical action and the amount of heat absorbed or generated

• the branch of medicine dealing with mental disorders attributable to diseases of the nervous system

• having a symmetrical arrangement of radiating parts about a central point