blot vs suck up

blot is a noun but suck up is not a noun.

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

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

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

blot (noun)	suck up (noun)
an act that brings discredit to the person who does it
a blemish made by dirt

blot (verb)	suck up (verb)
dry (ink) with blotting paper	try to gain favor by cringing or flattering
make a spot or mark onto	take in, also metaphorically
	ingratiate oneself to; often with insincere behavior