swarm vs plague

swarm and plague both are nouns.

Word	Noun	Adjective	Verb	Adverb
swarm	Yes	No	Yes	No
plague	Yes	No	Yes	No

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

Other hyponyms of swarm include infestation.

swarm (noun)	plague (noun)
a group of many things in the air or on the ground	an annoyance
a moving crowd	any large scale calamity (especially when thought to be sent by God)
	a swarm of insects that attack plants
	a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal
	any epidemic disease with a high death rate

swarm (verb)	plague (verb)
move in large numbers	annoy continually or chronically
be teeming, be abuzz	cause to suffer a blight