brainworker vs brain-worker

brainworker and brain-worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
brainworker	Yes	No	No	No
brain-worker	Yes	No	No	No

As nouns, brainworker and brain-worker are synonyms defined as:

brainworker and brain-worker: someone whose profession involves using his head to solve problems

brainworker (noun)	brain-worker (noun)
someone whose profession involves using his head to solve problems	someone whose profession involves using his head to solve problems