Modifiers matching serum:

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

Simple categories matching animal:

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