Modifiers matching invalid:

• socially-unaware,
• brilliant,
• crippled,
• gentle,
• sympathetic,
• insightful,
• innocent,
• socially-unintelligent,
• inspirational,
• scientific,
• rigid,
• weak,
• optimistic,
• stubborn,
• good-hearted,
• arrogant,
• gangly,
• bumbling,
• inspiring,
• kind-hearted,
• socially-awkward,
• aloof,

Simple categories matching rigid:

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