lollipop vs sucker

lollipop and sucker both are nouns.

Word	Noun	Adjective	Verb	Adverb
lollipop	Yes	No	No	No
sucker	Yes	No	No	No

As nouns, lollipop and sucker are synonyms defined as:

Other synonyms of lollipop include all-day sucker.

lollipop (noun)	sucker (noun)
hard candy on a stick	mostly North American freshwater fishes with a thick-lipped mouth for feeding by suction; related to carps
ice cream or water ice on a small wooden stick	an organ specialized for sucking nourishment or for adhering to objects by suction
	hard candy on a stick
	flesh of any of numerous North American food fishes with toothless jaws
	a drinker who sucks (as at a nipple or through a straw)
	a person who is gullible and easy to take advantage of
	a shoot arising from a plant's roots