lexicologist

from WordNet (r) 3.0 (2006)

lexicologist
    n 1: a compiler or writer of a dictionary; a student of the
         lexical component of language [syn: {lexicographer},
         {lexicologist}]

from The Collaborative International Dictionary of English v.0.48

Lexicologist \Lex`i*col"o*gist\
   (l[e^]ks`[i^]*k[o^]l"[-o]*j[i^]st), n.
   One versed in lexicology.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

25 Moby Thesaurus words for "lexicologist":
      dialectician, etymologer, etymologist, glossarist, glossographer,
      grammarian, grammaticaster, grammatist, lexicographer, linguist,
      linguistic scholar, linguistic scientist, linguistician,
      orthoepist, paleographer, philologaster, philologer, philologian,
      philologist, phonemicist, phonetician, phoneticist, phonologist,
      semanticist, semasiologist