LEXICOLOGY
lexicology
(noun) the branch of linguistics that studies the lexical component of language
Source: WordNet® 3.1
Etymology
Noun
lexicology (countable and uncountable, plural lexicologies)
(uncountable, linguistics) The part of linguistics that studies words, their nature and meaning, words' elements, relations between words including semantic relations, words groups and the whole lexicon.
(countable) A specific theory concerning the lexicon.
Source: Wiktionary
Lex`i*col"o*gy, n. Etym: [Gr. -logy: cf. F. lexicologie.]
Definition: The science of the derivation and signification of words; that
branch of learning which treats of the signification and application
of words.
Source: Webster’s Unabridged Dictionary 1913 Edition