Modifiers matching invalid:

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

Simple categories matching rigid:

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