sticker vs pricker

sticker and pricker both are nouns.

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

As nouns, sticker and pricker are synonyms defined as:

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

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

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