sticker vs paster

sticker and paster both are nouns.

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

As nouns, sticker and paster are synonyms defined as:

Other synonyms of sticker include gummed label.

sticker (noun)	paster (noun)
a short knife with a pointed blade used for piercing or stabbing	an adhesive label
an adhesive label	a workman who pastes
a particularly difficult or baffling question or problem
a small sharp-pointed tip resembling a spike on a stem or leaf