surface-assimilative vs adsorbent

surface-assimilative is not a noun while adsorbent is a noun.

Word	Noun	Adjective	Verb	Adverb
surface-assimilative	No	Yes	No	No
adsorbent	Yes	Yes	No	No

As adjectives, surface-assimilative and adsorbent are synonyms defined as:

surface-assimilative and adsorbent: having capacity or tendency to adsorb or cause to accumulate on a surface

Other synonyms of surface-assimilative include adsorptive.

surface-assimilative (noun)	adsorbent (noun)
	a material having capacity or tendency to adsorb another substance

surface-assimilative (adjective)	adsorbent (adjective)
having capacity or tendency to adsorb or cause to accumulate on a surface	having capacity or tendency to adsorb or cause to accumulate on a surface