Purist

n.	1.	One who aims at excessive purity or nicety, esp. in the choice of language. He [Fox] . . . purified vocabulary with a scrupulosity unknown to any purist. - Macaulay.
	2.	One who maintains that the New Testament was written in pure Greek.

Noun

1.

purist - someone who insists on great precision and correctness (especially in the use of words)

Pharisee, ass, bigot, bitter-ender, bluestocking, bullethead, classicist, conservative, die-hard, diehard, dogmatist, donkey, fanatic, formalist, hardnose, intransigeant, intransigent, last-ditcher, maverick, mule, pedant, perverse fool, pighead, plain stylist, positivist, precieuse, precieux, precisian, precisionist, puritan, standpat, standpatter, stickler, stuffed shirt, traditionalist