The nut of the class.
The nut of the squirrel.
The rut of the mind.
The smut of the chimney.
The smut of the movies.
The shut of the door.
The strut of the rafter.
The strut of the walker
The putt of the golfer,
And the putt-putt of the motor.
And the tut-tut of the scolder.