dredge vs dredger

dredge and dredger both are nouns.

Word	Noun	Adjective	Verb	Adverb
dredge	Yes	No	Yes	No
dredger	Yes	No	No	No

dredge (noun)	dredger (noun)
a power shovel to remove material from a channel or riverbed	a barge (or a vessel resembling a barge) that is used for dredging

dredge (verb)	dredger (verb)
remove with a power shovel, usually from a bottom of a body of water
search (as the bottom of a body of water) for something valuable or lost
cover before cooking