Linguist :: Linguist (n.) A master of the use of language; a talker.
Linguist :: Linguist (n.) A person skilled in languages.
Linguistical :: Linguistical (a.) Of or pertaining to language; relating to linguistics, or to the affinities of languages..
Linguistically :: Linguistically (adv.) In a linguistic manner; from the point of view of a linguist.
Linguistics :: Linguistics (n.) The science of languages, or of the origin, signification, and application of words; glossology..