absorber vs absorbent

absorber and absorbent both are nouns.

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

As nouns, absorbent is a hypernym of absorber; that is, absorbent is a word with a broader meaning than absorber:

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

Other hypernyms of absorber include absorbent material.

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

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