control vs rein

control and rein both are nouns.

Word	Noun	Adjective	Verb	Adverb
control	Yes	No	Yes	No
rein	Yes	No	Yes	No

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

As verbs, rein is a hyponym of control; that is, rein is a word with a more specific, narrower meaning than control:

control (noun)	rein (noun)
the activity of managing or exerting control over something	one of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse
(physiology) regulation or maintenance of a function or action or reflex etc	any means of control
a mechanism that controls the operation of a machine
power to direct or determine
discipline in personal and social activities
great skillfulness and knowledge of some subject or activity
a standard against which other conditions can be compared in a scientific experiment
the economic policy of controlling or limiting or curbing prices or wages etc.
a spiritual agency that is assumed to assist the medium during a seance
a relation of constraint of one entity (thing or person or group) by another
the state that exists when one person or group has power over another

control (verb)	rein (verb)
have a firm understanding or knowledge of; be on top of	keep in check
be careful or certain to do something; make certain of something	stop or slow up one's horse or oneself by or as if by pulling the reins
verify by using a duplicate register for comparison	stop or check by or as if by a pull at the reins
handle and cause to function	control and direct with or as if by reins
maintain influence over (others or oneself) skillfully, usually to one's advantage
exercise authoritative control or power over
lessen the intensity of; temper; hold in restraint; hold or keep within limits
check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard
place under restrictions; limit access to by law