12-Letter Words Containing: A,I,R,S,Y

• the study of physical features of the earth's surface

• an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure

• Exhibiting symmetry around an axis; exhibiting cylindrical symmetry.

• having become fixed and definite in form

• having both internal structure and external form of a crystal

• a broad highway designed for high-speed traffic

• an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form

• A disturbance to an otherwise normal biological rhythm (especially that of the heart).