formant /förˈmənt/

1. A component of a speech sound determining its particular quality (acoustics)
2. Anything that determines, limits or defines

• air-passages
• air-piracies
• air-piracy
• air pistol
• air pistols
• airplane
• airplanes
• air-plant
• air-plants
• air play
• air plays
• air-pocket
• air-pockets
• air pollution
• air pollutions
• airport
• airport fiction
• airport fictions
• airports
• air-power
• air-powers
• air-propeller
• airprox
• air-pump
• air-pumps