prankster vs practical joker

prankster and practical joker both are nouns.

Word	Noun	Adjective	Verb	Adverb
prankster	Yes	No	No	No
practical joker	Yes	No	No	No

As nouns, prankster and practical joker are synonyms defined as:

prankster and practical joker: someone who plays practical jokes on others

Other synonyms of prankster include cut-up, hoaxer, tricker, trickster.

prankster (noun)	practical joker (noun)
someone who plays practical jokes on others	someone who plays practical jokes on others