abradant vs abrader

abradant and abrader both are nouns.

Word	Noun	Adjective	Verb	Adverb
abradant	Yes	No	No	No
abrader	Yes	No	No	No

As nouns, abradant and abrader are synonyms defined as:

abradant and abrader: a tool or machine used for wearing down or smoothing or polishing

abradant (noun)	abrader (noun)
a tool or machine used for wearing down or smoothing or polishing	a tool or machine used for wearing down or smoothing or polishing
a substance that abrades or wears down