phonology (n.)

• ablaut
• derivation
• dialectology
• etymology
• glottochronology
• gradation
• grammar
• lexicology
• lexicostatistics
• linguistics
• morphology
• morphophonemics
• mutation
• orthoepy
• paleography
• philology
• phonetics
• psycholinguistics
• semantics
• sociolinguistics
• structuralism
• umlaut