Noun
thinker -
someone who exercises the mind (usually in an effort to reach a decision)
intellectual ,
intellect a person who uses the mind creatively
brain-worker ,
brainworker someone whose profession involves using his head to solve problems
classifier a word or morpheme used in some languages in certain contexts (such as counting) to indicate the semantic class to which the counted item belongs
divergent thinker a thinker who moves away from the problem as stated and often has novel ideas and solutions
excogitator a thinker who considers carefully and thoroughly
muser ,
ponderer ,
ruminator ,
muller a reflective thinker characterized by quiet contemplation
arranger ,
organiser ,
organizer a musician who adapts a composition for particular voices or instruments or for another style of performance
philosophiser ,
philosophizer someone who considers situations from a philosophical point of view
convergent thinker ,
problem solver ,
solver a thinker who focuses on the problem as stated and tries to synthesize information and knowledge to achieve a solution
ratiocinator ,
reasoner someone who reasons logically
rocket scientist a clever thinker; "you do not have to be a rocket scientist to figure that out"
thinker -
an important intellectual; "the great minds of the 17th century"
creative thinker ,
mind
intellectual ,
intellect a person who uses the mind creatively