Modifiers matching serum:

• maternal,
• nonhuman,
• avian,
• fluid,
• animal,
• adult,
• expensive,

Simple categories matching animal:

• protease,
• food,
• part,
• farming,
• image,
• feed,
• prey,
• enzyme,
• offal,
• inhabitant,
• attribute,
• friend,
• pest,
• record,
• model,
• meat,
• blood,
• establishment,
• disturbance,
• event,
• predator,
• data,
• eukaryote,
• waste,
• protein,
• livestock,
• cat,
• source,
• show,
• matter,
• scavenger,
• metabolite,
• feature,
• sample,
• information,
• mite,
• business,
• excrement,
• unit,
• rotavirus,
• poison,
• film,
• relative,
• drive,
• eyes,
• wax,
• decoy,
• polysaccharide,
• microbe,
• jewelry,
• claw,
• process,
• cell,
• tissue,
• sting,
• serum,
• sense,
• print,
• repellent,
• substance,
• figure,
• ad,
• sanctuary,
• style,
• habitat,
• track,
• fur,
• disposal,
• appendage,
• perfume,
• performance,
• artifact,
• worker,
• quality,
• facility,
• level,
• display,
• avatar,
• response,
• creature,
• centre,
• component,
• sign,
• physiology,
• endeavor,
• smell,
• experiment,
• laws,
• call,
• agent,
• bite,
• injury,
• enclosure,
• interaction,
• system,
• target,
• bait,
• agriculture,
• milk,
• control,
• sound,
• feeder,
• research,
• souvenir,
• welfare,
• body,
• work,
• plankton,
• ride,
• artefact,
• behavior,
• study,
• picornavirus,
• item,
• organism,
• essence,
• action,
• foodstuff,
• use,
• meal,
• science,
• industry,
• cartilage,
• lipase,
• clue,
• secretion,
• health,
• covering,
• power,
• odor,
• hazard,
• litter,
• activity,
• production,
• park,
• matrix,
• bedding,
• hair,
• care,
• excretion,
• magazine,
• derivative,
• photography,
• race,
• nutrient,
• embryo,
• housing,
• tumour,
• byproduct,
• plasmodium,
• lover,
• area,
• voice,
• rennet,
• trait,
• organ,
• gum,
• host,
• sacrifice,
• dance,
• enterprise,
• practice,
• hybrid,
• pet,
• container,
• shelter,
• procedure,
• shampoo,
• fodder,
• transport,
• excreta,
• ingredient,
• constraint,
• fluid,
• behaviour,
• pollinator,
• resident,
• noise,
• supply,
• life,
• constituent,
• carcass,
• forage,
• creation,
• clone,
• protection,
• carrier,
• feces,
• residue,
• head,
• personality,
• technology,
• drug,
• expert,
• scent,
• restraint,
• contamination,
• teeth,
• urine,
• marker,
• structure,
• parasite,
• gland,
• evidence,
• wellbeing,
• particle,
• biology,
• movement,
• toy,
• nutrition,
• disorder,
• proteinase,
• article,
• statue,
• variable,
• material,
• professional,
• house,
• horn,
• requirement,
• existence,
• ear,
• allergen,
• barrier,
• set,
• sport,
• form,
• character,
• manure,
• microorganism,
• gathering,
• spoor,
• spine,
• fish,
• education,
• taxon,
• pattern,
• invertebrate,
• cause,
• organs,
• pathogen,
• bones,
• desire,
• criterion,
• origin,
• farm,
• helminth,
• infection,
• field,
• pheromone,
• vocalization,
• experimentation,
• egg,
• home,
• pendant,
• cancer,
• symbol,
• disease,
• hide,
• illness,
• characteristic,
• tumor,
• mask,
• community,
• product,
• contaminant,
• steroid,
• vertebrate,
• mixture,
• thyroid,
• species,
• property,
• organisation,