regulator vs controller

regulator and controller both are nouns.

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

As nouns, controller is a hypernym of regulator; that is, controller is a word with a broader meaning than regulator:

regulator: any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc.
controller: a mechanism that controls the operation of a machine

Other hypernyms of regulator include control.

As nouns, controller is a hypernym of regulator; that is, controller is a word with a broader meaning than regulator:

regulator: a control that maintains a steady speed in a machine (as by controlling the supply of fuel)
controller: a mechanism that controls the operation of a machine

Other hypernyms of regulator include control.

regulator (noun)	controller (noun)
any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc.	a mechanism that controls the operation of a machine
a control that maintains a steady speed in a machine (as by controlling the supply of fuel)	someone who maintains and audits business accounts
an official responsible for control and supervision of a particular activity or area of public interest	a person who directs and restrains