Modifiers matching appendage:

• epidermal,
• turgid,
• adult,
• awkward,
• free,
• flexible,
• oscillating,
• dermal,
• soft,
• epithelial,
• smaller,
• biological,
• metal,
• related,
• hard,
• injured,
• external,
• underwater,
• moving,
• tough,
• loose,
• specialized,
• conventional,
• developing,
• delicate,
• small,
• inert,
• animal,
• elastic,
• complex,
• ectodermal,
• outer,
• rigid,
• movable,
• mammalian,
• detachable,
• sensory,
• diverse,
• traditional,
• light,
• anatomic,
• regular,
• mechanical,
• jointed,
• distal,
• new,
• cutaneous,
• fixed,
• fleshy,
• major,

Simple categories matching rigid:

• surface,
• sphere,
• protein,
• floor,
• material,
• base,
• profile,
• object,
• container,
• structure,
• display,
• finish,
• mineral,
• connection,
• sorbent,
• body,
• panel,
• armour,
• implement,
• watercraft,
• matrix,
• shape,
• block,
• entity,
• element,
• form,
• component,
• plant,
• plate,
• substrate,
• packing,
• article,
• covering,
• item,
• filler,
• pipe,
• ground,
• paper,
• rock,
• textile,
• piece,
• part,
• shaft,
• transparency,
• feature,
• pavement,
• cement,
• transformation,
• product,
• movement,
• organ,
• lining,
• adhesive,
• construction,
• airfoil,
• unit,
• boundary,
• polymer,
• wall,
• connector,
• hanger,
• sector,
• fiber,
• appliance,
• post,
• dressing,
• thermoplastic,
• web,
• tissue,
• measure,
• obstruction,
• obstacle,
• solid,
• devices,
• tool,
• sheet,
• casing,
• matter,
• insulation,
• fixing,
• particle,
• document,
• resin,
• bed,
• molecule,
• support,
• carrier,
• cutoff,
• vehicle,
• foam,
• fibre,
• strip,
• boot,
• case,
• coil,
• cylinder,
• fastener,
• means,
• architecture,
• device,
• gel,
• member,
• fixture,
• deck,
• change,
• tube,
• package,
• luggage,
• barrier,
• appendage,
• metal,
• macromolecule,
• stick,
• organs,
• tip,
• food,
• class,
• monomer,
• frame,
• space,
• plastic,
• representation,
• group,
• thread,
• portion,
• medium,
• layer,
• cloth,
• motion,
• system,
• instrument,
• foundation,
• alteration,
• mechanism,
• tubing,
• cover,
• instrumentation,
• rod,
• splint,
• fabric,
• substance,
• deposit,
• bottle,
• hitch,
• aggregate,