suck vs absorb

suck is a noun but absorb is not a noun.

Word	Noun	Adjective	Verb	Adverb
suck	Yes	No	Yes	No
absorb	No	No	Yes	No

As verbs, suck and absorb are synonyms defined as:

Other synonyms of suck include draw, imbibe, soak up, sop up, suck up, take in, take up.

As verbs, absorb is a hypernym of suck; that is, absorb is a word with a broader meaning than suck:

Other hypernyms of suck include take in.

suck (noun)	absorb (noun)
the act of sucking

suck (verb)	absorb (verb)
give suck to	cause to become one with
draw into the mouth by creating a practical vacuum in the mouth	take up mentally
take in, also metaphorically	consume all of one's attention or time
draw something in by or as if by a vacuum	devote (oneself) fully to
provide sexual gratification through oral stimulation	take in, also metaphorically
be inadequate or objectionable	become imbued
attract by using an inexorable force, inducement, etc.	assimilate or take in
	take up, as of debts or payments
	suck or take up or in