absorber vs absorbent material

absorber and absorbent material both are nouns.

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

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

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

Other hypernyms of absorber include absorbent.

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