15-Letter Words Containing: _,I,O,R,R,S,S,T

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

• failure of one or both testes to move into the scrotum as the male fetus develops

• someone who plays the harpsichord

• Any qualified majority, specified in advance of a vote, required for the vote to be passed

• The state or quality of being crashworthy.

• The branch of chemistry that involves the spatial arrangement of the atoms of molecules, and studies how this affects the physical and chemical properties of such species

• The effect of such spatial arrangement on the chemistry of a particular compound