herd vs herder

herd and herder both are nouns.

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

herd (noun)	herder (noun)
a group of cattle or sheep or other domestic mammals all of the same kind that are herded by humans	someone who drives a herd
a group of wild mammals of one species that remain together: antelope or elephants or seals or whales or zebra
a crowd especially of ordinary or undistinguished persons or things

herd (verb)	herder (verb)
move together, like a herd
cause to herd, drive, or crowd together
keep, move, or drive animals