is a specific kind of: expert.

is a broader term that covers: enologist, fermentologist, oenologist | attache | canonist | criminologist | crystallographer | nutritionist | dietician, dietitian | educationalist, educationist | fingerprint expert, fingerprint man, fingerprint specialist | Germanist | designer, graphic designer | graphologist, handwriting expert | designer, interior designer | decorator, house decorator, interior decorator, room decorator | limnologist | meteorologist | oculist, optometrist | orientalist | Teutonist | arborist, tree surgeon ... show more.

is the opposite of: generalist, Renaissance man.

derivation: specialisation, specialism, speciality, specialization, specialty | specialism | specialise, specialize | specialistic | specialistic.