Cumudgeon vs Crank - What's the difference?

cumudgeon | crank |

As an adjective crank is

(slang) strange, weird, odd.

As a noun crank is

a bent piece of an axle or shaft, or an attached arm perpendicular, or nearly so, to the end of a shaft or wheel, used to impart a rotation to a wheel or other mechanical device; also used to change circular into reciprocating motion, or reciprocating into circular motion.

As a verb crank is

to turn by means of a crank .