joker vs jokester

joker and jokester both are nouns.

Word	Noun	Adjective	Verb	Adverb
joker	Yes	No	No	No
jokester	Yes	No	No	No

As nouns, joker and jokester are synonyms defined as:

joker (noun)	jokester (noun)
a playing card that is usually printed with a picture of a jester	a person who enjoys telling or playing jokes
an inconspicuous clause in a document or bill that affects its meaning in a way that is not immediately apparent
a person who enjoys telling or playing jokes
a person who does something thoughtless or annoying