Found:

• Factive predicate
• False vocal folds
• Falsetto
• Fatigue: see Adaptation
• Feature
• Feature analysis: see X-bar theory
• Feature checking
• Feature matrix
• Feature Percolation
• Feature Percolation Conventions
• Feedback
• Feet: see foot
• Felicity condition
• Fewest Steps
• Filter
• Filter slope
• Final lengthening
• First Order Projection Condition
• First Sister Principle
• Fixed-context assumption
• Flap
• Floating quantifier
• Focus
• Foot
• FOPC: see First Order Projection Condition
• Forensic phonetics
• Formant
• Formant bandwidth
• Formant filter
• Formant synthesis
• Formant track
• Formant transition
• Formula
• Fourier theorem
• Free
• Free morpheme
• Free relative
• Free variable: see Binding
• Frequency
• Frequency component
• Fricative
• Front-end
• Frozen Structure Constraint
• Fuckin' insertion
• Full Interpretation
• Function Chain
• Function composition
• Functional Projection
• Functional shift: see Conversion
• Functor
• Fundamental frequency
• Fusional morphology