Found:

• Label: see Tree structure, Merge
• Labeled bracketing
• Labial
• Labialisation
• Labiodental
• Lambda-abstraction
• Lambda-operator
• Laminal
• Landing-site
• Laryngectomy
• Larynx
• Last Resort
• Lateral
• Latinate affix
• Lax: see Tense
• Layered morphology
• LCS: see Lexical Conceptual Structure
• Left Branch Condition
• Left downward monotonicity
• Left monotone decreasing: see Left downward monotonicity
• Left monotone increasing: see Left upward monotonicity
• Left upward monotonicity
• Left-dislocation
• Leftness condition
• Lenition
• Level
• Level I/II affix: see Class I/II affix
• Level Ordering Hypothesis
• Lexeme
• Lexical ambiguity
• Lexical array
• Lexical categories: see Lexical category
• Lexical category
• Lexical category prominence
• Lexical component
• Lexical Conceptual Structure
• Lexical decomposition: see Componential analysis
• Lexical insertion
• Lexical integrity
• Lexical Morphology
• Lexical Phonology: see Lexical Morphology
• Lexical relatedness
• Lexical semantics
• Lexical subarray
• Lexical transformation
• Lexicalist Hypothesis
• Lexicalization
• Lexicon
• LF: see Logical form
• LF model
• L-feature
• Liaison
• Liar's paradox
• License: see Licensing
• Licensing
• Light verb
• Linear Predictive Coding: see LPC
• Liquid
• Listeme
• Listing
• Live on property: see Conservativity
• L-marked: see L-marking
• L-marking
• Loan word
• Local binding
• Local economy: see Global economy
• Localism
• Locality
• Locus
• Locutionary act: see Speech act
• Logic
• Logical constant
• Logical equivalence: see Equivalence
• Logical form
• Logical implication: see Implication
• Logical semantics
• Logical subject: see Passive
• Logical truth: see Tautology
• Logogen model
• Logophoricity
• Look-ahead
• Look-ahead model
• Loop
• Low
• LPC
• L-related