In contrast, morphological typology is the classification of languages according to their "use" of morphemes, while lexicology is the study of those words forming a language's wordstock.
Contrastive descriptions can occur at every level of linguistic structure: speech sounds (phonology), written symbols (graphology), word-formation (morphology), word meaning (lexicology), collocation (phraseology), sentence structure (syntax) and complete discourse (textology).
