tab key vs tab

tab key and tab both are nouns.

Word	Noun	Adjective	Verb	Adverb
tab key	Yes	No	No	No
tab	Yes	No	No	No

As nouns, tab key and tab are synonyms defined as:

tab key and tab: the key on a typewriter or a word processor that causes a tabulation

tab key (noun)	tab (noun)
the key on a typewriter or a word processor that causes a tabulation	a dose of medicine in the form of a small pellet
	a short strip of material attached to or projecting from something in order to facilitate opening or identifying or handling it
	the key on a typewriter or a word processor that causes a tabulation
	the bill in a restaurant
	sensationalist journalism