15-Letter Words Containing: _,A,R,R,S,T,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

• Branch of psychiatry concerned with the prevention of mental illness, especially in the young

• To crystallize again; especially as a means of purification.

• 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 science that studies the formation and structure of crystals

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

• The study of the stratigraphic distribution of fossils.

• change completely the nature or appearance of