Modifiers matching amphibian:

• moist,
• small,
• native,
• aquatic,
• common,
• rare,
• modern,
• adult,
• semiaquatic,
• exotic,
• terrestrial,
• nocturnal,
• tropical,
• familiar,
• large,
• resident,
• larger,

Simple categories matching adult:

• tissue,
• structure,
• arthritis,
• beach,
• companion,
• item,
• activity,
• relative,
• equipment,
• course,
• business,
• product,
• animal,
• employee,
• food,
• interaction,
• pet,
• toy,
• neoplasm,
• sport,
• program,
• fun,
• content,
• brain,
• material,
• lore,
• entertainer,
• pest,
• appendage,
• expert,
• measure,
• disorder,
• invertebrate,
• disease,
• facility,
• fish,
• use,
• topic,
• feature,
• population,
• folklore,
• condition,
• emotion,
• livestock,
• issue,
• organisation,
• life,
• job,
• practitioner,
• picture,
• woman,
• ruminant,
• organ,
• problem,
• characteristic,
• behavior,
• caregiver,
• mammalian,
• matter,
• primate,
• gathering,
• worker,
• insect,
• adviser,
• vaccination,
• pastime,
• trait,
• institution,
• status,
• thing,
• relationship,
• athlete,
• amphibian,
• control,
• individual,
• decision,
• tumor,
• weevil,
• stage,
• cabaret,
• form,
• matrikin,
• mammal,
• responsibility,
• serum,
• role,
• recreation,
• bookstore,
• entertainment,
• nature,
• fiction,
• organism,
• fly,
• learner,
• horse,
• skill,
• gatekeeper,
• attribute,
• class,
• option,
• function,
• cancer,
• resort,
• help,
• communication,
• organs,
• union,
• disposition,
• figure,
• urodele,
• amusement,
• infection,
• behaviour,
• consequence,
• organization,
• service,
• theme,
• carnivore,
• quality,
• professional,
• vessel,
• show,
• male,
• event,
• experience,
• part,
• situation,
• muscle,
• action,
• bug,
• game,
• predator,
• cell,
• salamander,
• expense,
• authority,
• gland,
• group,
• comic strip,
• dress,
• celebration,
• character,
• illness,
• kin,
• vertebrate,