fortune teller vs fortuneteller

fortune teller and fortuneteller both are nouns.

Word	Noun	Adjective	Verb	Adverb
fortune teller	Yes	No	No	No
fortuneteller	Yes	No	No	No

As nouns, fortune teller and fortuneteller are synonyms defined as:

fortune teller and fortuneteller: a person who foretells your personal future

fortune teller (noun)	fortuneteller (noun)
a person who foretells your personal future	a person who foretells your personal future