toady vs suck up

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

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

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

Other synonyms of toady include bootlick, fawn, kotow, kowtow, truckle.

toady (noun)	suck up (noun)
a person who tries to please someone in order to gain a personal advantage

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