Category Nuances for null:

• noxious,
• small,
• fluffy,
• smaller,
• cold,
• seasonal,
• rabid,
• walking,
• furry,
• cheaper,
• wild,
• female,
• warm,
• exotic,
• multicellular,
• ordinary,
• feral,
• large,
• wonderful,
• special,
• domestic,
• nonnative,
• bigger,
• nonruminant,
• home,
• strange,
• foreign,
• stock,
• larger,
• terrestrial,
• younger,
• handmade,
• working,
• model,
• flighty,
• defenseless,
• ferocious,
• friendly,
• mammalian,
• complex,
• lovely,
• adorable,
• timid,
• unclean,
• african,
• helpless,
• unwanted,
• biological,
• important,
• identifiable,
• feline,
• whole,
• mental,
• raised,
• common,
• lighter,
• verminous,
• lucky,
• natural,
• favorite,
• blooded,
• edible,
• indoor,
• conventional,
• animated,
• stuffed,
• fuzzy,
• organic,
• innocent,
• unfortunate,
• digestive,
• little,
• experimental,
• primitive,
• definitive,
• additional,
• cunning,
• indian,
• useful,
• mean,
• injured,
• moving,
• suitable,
• graceful,
• available,
• undesirable,
• rich,
• kosher,
• ecological,
• interesting,
• fat,
• potential,
• mild,
• frozen,
• medium,
• beautiful,
• isolated,
• popular,
• individual,
• upland,
• gentle,
• symbolic,
• easier,
• immature,
• white,
• rare,
• invertebrate,
• off,
• favourite,
• breeding,
• brash,
• cool,
• beneficial,
• standard,
• agricultural,
• cocky,
• avian,
• threatened,
• commercial,
• male,
• lovable,
• out,
• lower,
• herbivorous,
• wandering,
• aquatic,
• european,
• random,
• mobile,
• animal,
• environmental,
• eukaryotic,
• size,
• nonchalant,
• arctic,
• raw,
• sensitive,
• weaker,
• soft,
• playful,
• adult,
• quiet,
• distant,
• easy,
• domesticated,
• true,
• weak,
• possible,
• unusual,
• free,
• susceptible,
• vulnerable,
• sized,
• big,
• developed,
• newborn,
• dead,
• restricted,
• observable,
• prepared,
• cuddly,
• fresh,
• tiny,
• elusive,
• alien,
• unique,
• bland,
• innocuous,
• neutral,
• major,
• swifter,
• devious,
• woody,
• primary,
• self-assured,
• fast,
• docile,
• sick,
• outdoor,
• first,
• evil,
• resident,
• invasive,
• classical,
• nonhuman,
• flying,
• voracious,
• ruminant,
• active,
• delicate,
• orphaned,
• new,
• fleet,
• everyday,
• pregnant,
• loving,
• intermediate,
• indigenous,
• stray,
• related,
• up,
• easter,
• urban,
• traditional,
• level,
• higher,
• familiar,
• clever,
• legged,
• sentient,
• real,
• hearty,
• quadruped,
• skinned,
• abundant,
• virile,
• young,
• harmless,
• bloody,
• nocturnal,
• sweet,
• dangerous,
• fatty,
• desirable,
• whimsical,
• alternative,
• diverse,
• miscellaneous,
• native,
• typical,
• quick,
• light,
• cute,
• pesky,
• low,
• valuable,
• local,

Simple Categories for null:

• mammal,
• organs,
• livestock,
• fur,
• animal,
• cell,
• prey,
• land,
• activator,
• pet,
• object,
• game,
• rodent,
• quarry,
• plant,
• matter,
• vertebrate,
• assembly,
• material,
• pest,
• creature,
• varmint,
• mascot,
• fauna,
• predator,
• item,
• meat,
• herbivore,
• food,
• system,
• neighbour,
• bird,
• stuff,
• affinity,
• bedding,
• part,
• control,
• organism,
• hide,
• beast,
• person,
• critter,
• thing,
• unit,
• group,
• host,
• clone,
• possession,