swarm vs group

swarm and group both are nouns.

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

As nouns, group is a hypernym of swarm; that is, group is a word with a broader meaning than swarm:

Other hypernyms of swarm include grouping.

swarm (noun)	group (noun)
a group of many things in the air or on the ground	any number of entities (members) considered as a unit
a moving crowd	a set that is closed, associative, has an identity element and every element has an inverse
	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

swarm (verb)	group (verb)
move in large numbers	arrange into a group or groups
be teeming, be abuzz	form a group or group together