arm vs cuff

arm and cuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
arm	Yes	No	Yes	No
cuff	Yes	No	Yes	No

arm (noun)	cuff (noun)
the part of a garment that is attached at the armhole and that provides a cloth covering for the arm	the lap consisting of a turned-back hem encircling the end of the sleeve or leg
any instrument or instrumentality used in fighting or hunting	shackle that consists of a metal loop that can be locked around the wrist; usually used in pairs
the part of an armchair or sofa that supports the elbow and forearm of a seated person
any projection that is thought to resemble a human arm
a human limb; technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb
a division of some larger or more complex organization

arm (verb)	cuff (verb)
prepare oneself for a military confrontation	hit with the hand
supply with arms	confine or restrain with or as if with manacles or handcuffs
	to get involved in a relationship with another person