absorbent vs absorber

absorbent and absorber both are nouns.

Word	Noun	Adjective	Verb	Adverb
absorbent	Yes	Yes	No	No
absorber	Yes	No	No	No

As nouns, absorber is a hyponym of absorbent; that is, absorber is a word with a more specific, narrower meaning than absorbent:

absorbent: a material having capacity or tendency to absorb another substance
absorber: (physics) material in a nuclear reactor that absorbs radiation

Other hyponyms of absorbent include sponge, absorbent cotton.

absorbent (noun)	absorber (noun)
a material having capacity or tendency to absorb another substance	(physics) material in a nuclear reactor that absorbs radiation

absorbent (adjective)	absorber (adjective)
having power or capacity or tendency to absorb or soak up something (liquids or energy etc.)