erosion vs corroding

erosion and corroding both are nouns.

Word	Noun	Adjective	Verb	Adverb
erosion	Yes	No	No	No
corroding	Yes	No	No	No

As nouns, erosion and corroding are synonyms defined as:

Other synonyms of erosion include corrosion.

erosion (noun)	corroding (noun)
(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively	erosion by chemical action
erosion by chemical action
a gradual decline of something
condition in which the earth's surface is worn away by the action of water and wind