link vs contact

link and contact both are nouns.

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

As nouns, link and contact are synonyms defined as:

Other synonyms of link include inter-group communication, liaison.

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

link: the state of being connected
contact: the state or condition of touching or of being in immediate proximity

link (noun)	contact (noun)
a fastener that serves to join or connect	the act of touching physically
a two-way radio communication system (usually microwave); part of a more extensive telecommunication network	close interaction
an interconnecting circuit between two or more locations for the purpose of transmitting and receiving data	(electronics) a junction where things (as two electrical conductors) touch or are in physical contact
a channel for communication between groups	a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
(computing) an instruction that connects one part of a program or an element on a list to another program or list	a channel for communication between groups
a unit of length equal to 1/100 of a chain	a communicative interaction
the means of connection between things linked in series	the physical coming together of two or more things
a connecting shape	a person who is in a position to give you special assistance
the state of being connected	the state or condition of touching or of being in immediate proximity

link (verb)	contact (verb)
make a logical or causal connection	be in or establish communication with
connect, fasten, or put together two or more pieces	be in direct physical contact with; make contact
link with or as with a yoke
be or become joined or united or linked