HITCHHIKER – HOE:
Lone Sam was an old-time hitchhiker
Who would ride with a trucker or biker.
In a pickup he'd go
In the back with a hoe,
Wheelbarrow, and sow – and he'd like her!

QUADRATIC – QUAINT:
He taught how to solve the quadratic,
The difficult, the enigmatic.
He's been put in restraint
For his methods too quaint –
He kept undergrads in the attic.

RIFLE – RIM