controller vs handwheel

controller and handwheel both are nouns.

Word	Noun	Adjective	Verb	Adverb
controller	Yes	No	No	No
handwheel	Yes	No	No	No

As nouns, handwheel is a hyponym of controller; that is, handwheel is a word with a more specific, narrower meaning than controller:

controller: a mechanism that controls the operation of a machine
handwheel: control consisting of a wheel whose rim serves as the handle by which a part is operated

controller (noun)	handwheel (noun)
a mechanism that controls the operation of a machine	control consisting of a wheel whose rim serves as the handle by which a part is operated
someone who maintains and audits business accounts	a wheel worked by hand
a person who directs and restrains