pricker vs sticker

pricker and sticker both are nouns.

Word	Noun	Adjective	Verb	Adverb
pricker	Yes	No	No	No
sticker	Yes	No	No	No

As nouns, pricker and sticker are synonyms defined as:

pricker and sticker: a small sharp-pointed tip resembling a spike on a stem or leaf

Other synonyms of pricker include prickle, spikelet, spine, thorn.

pricker (noun)	sticker (noun)
an awl for making small holes for brads or small screws	a short knife with a pointed blade used for piercing or stabbing
a small sharp-pointed tip resembling a spike on a stem or leaf	an adhesive label
	a particularly difficult or baffling question or problem
	a small sharp-pointed tip resembling a spike on a stem or leaf