rub vs contact

rub and contact both are nouns.

Word	Noun	Adjective	Verb	Adverb
rub	Yes	No	Yes	No
contact	Yes	No	Yes	No

As nouns, contact is a hypernym of rub; that is, contact is a word with a broader meaning than rub:

Other hypernyms of rub include physical contact.

As verbs, contact is a hypernym of rub; that is, contact is a word with a broader meaning than rub:

Other hypernyms of rub include adjoin, meet, touch.

rub (noun)	contact (noun)
the act of rubbing or wiping	the act of touching physically
an unforeseen obstacle	close interaction
	(electronics) a junction where things (as two electrical conductors) touch or are in physical contact
	a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
	a channel for communication between groups
	a communicative interaction
	the physical coming together of two or more things
	a person who is in a position to give you special assistance
	the state or condition of touching or of being in immediate proximity

rub (verb)	contact (verb)
move over something with pressure	be in or establish communication with
cause friction	be in direct physical contact with; make contact
scrape or rub as if to relieve itching