Category Nuances for coupler:

• spare,
• passive,
• heavy,
• moving,
• directional,
• vital,
• static,
• stock,
• small,
• optical,
• complex,
• approved,
• loose,
• planar,
• peripheral,
• analog,
• flexible,
• old,
• critical,
• external,
• auxiliary,
• delicate,
• related,
• fixed,

Simple Categories for coupler:

• device,
• structure,
• equipment,
• part,
• hardware,
• coupling,
• stuff,
• system,