assimilative vs absorbent

assimilative is not a noun while absorbent is a noun.

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

assimilative (noun)	absorbent (noun)
	a material having capacity or tendency to absorb another substance

assimilative (adjective)	absorbent (adjective)
capable of taking (gas, light, or liquids) into a solution	having power or capacity or tendency to absorb or soak up something (liquids or energy etc.)
capable of mentally absorbing