brainworker vs thinker

brainworker and thinker both are nouns.

Word	Noun	Adjective	Verb	Adverb
brainworker	Yes	No	No	No
thinker	Yes	No	No	No

As nouns, thinker is a hypernym of brainworker; that is, thinker is a word with a broader meaning than brainworker:

brainworker: someone whose profession involves using his head to solve problems
thinker: someone who exercises the mind (usually in an effort to reach a decision)

brainworker (noun)	thinker (noun)
someone whose profession involves using his head to solve problems	an important intellectual
	someone who exercises the mind (usually in an effort to reach a decision)