bolus vs tab

bolus and tab both are nouns.

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

As nouns, tab is a hypernym of bolus; that is, tab is a word with a broader meaning than bolus:

Other hypernyms of bolus include lozenge, pill, tablet.

bolus (noun)	tab (noun)
a large pill; used especially in veterinary medicine	a dose of medicine in the form of a small pellet
a small round soft mass (as of chewed food)	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