keep vs herd

keep and herd both are nouns.

Word	Noun	Adjective	Verb	Adverb
keep	Yes	No	Yes	No
herd	Yes	No	Yes	No

As verbs, herd is a hyponym of keep; that is, herd is a word with a more specific, narrower meaning than keep:

keep (noun)	herd (noun)
the main tower within the walls of a medieval castle or fortress	a group of cattle or sheep or other domestic mammals all of the same kind that are herded by humans
a cell in a jail or prison	a group of wild mammals of one species that remain together: antelope or elephants or seals or whales or zebra
the financial means whereby one lives	a crowd especially of ordinary or undistinguished persons or things

keep (verb)	herd (verb)
prevent (food) from rotting	move together, like a herd
prevent the action or expression of	cause to herd, drive, or crowd together
stick to correctly or closely	keep, move, or drive animals
maintain by writing regular records
supply with necessities and support
hold and prevent from leaving
retain possession of
look after; be the keeper of; have charge of
retain rights to
maintain for use and service
have as a supply
store or keep customarily
stop (someone or something) from doing something or being in a certain state
allow to remain in a place or position or maintain a property or feature
conform one's action or practice to
behave as expected during of holidays or rites
cause to continue in a certain state, position, or activity
supply with room and board
maintain in safety from injury, harm, or danger
fail to spoil or rot
continue a certain state, condition, or activity
to rear