Modifiers matching aircraft:

• sophisticated,
• maneuverable,
• military,
• aerodynamic,
• available,
• operational,
• heavier,
• typical,
• small,
• annoying,
• up,
• complicated,
• conventional,
• larger,
• exotic,
• local,
• large,
• advanced,
• light,
• transient,
• real,
• deadly,
• naval,
• powerful,
• exciting,
• heavy,
• foreign,
• unstable,
• moving,
• model,
• flexible,
• modern,
• complex,
• smaller,
• flying,
• loud,
• commercial,
• bigger,
• new,
• traditional,
• secret,
• controlled,
• unmanned,
• slower,

Simple categories matching unstable:

• surface,
• object,
• protein,
• structure,
• region,
• material,
• assembly,
• control,
• particle,
• artifact,
• container,
• item,
• weather,
• phenomenon,
• component,
• slope,
• network,
• rock,
• location,
• substance,
• chemical,
• medium,
• situation,
• apparatus,
• article,
• place,
• star,
• substrate,
• soil,
• system,
• event,
• solid,
• basin,
• stone,
• operation,
• mineral,
• ground,
• equipment,
• portion,
• elements,
• earth,
• community,
• formation,
• matter,
• support,
• grain,
• lubricant,
• elevation,
• period,
• vehicle,
• form,
• gas,
• aircraft,
• terrain,
• molecule,
• furniture,
• fabric,
• compound,