soak up vs suck up

soak up and suck up both are verbs.

Word	Noun	Adjective	Verb	Adverb
soak up	No	No	Yes	No
suck up	No	No	Yes	No

As verbs, soak up and suck up are synonyms defined as:

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

soak up (verb)	suck up (verb)
devote (oneself) fully to	try to gain favor by cringing or flattering
take in, also metaphorically	take in, also metaphorically
	ingratiate oneself to; often with insincere behavior