Modifiers matching duck:

• jealous,
• small,
• tenacious,
• short-tempered,
• boastful,
• larger,
• marine,
• bullying,
• large,
• optimistic,
• zany,
• smaller,
• insecure,
• paranoid,
• here,
• domestic,
• pushy,
• brash,
• wild,
• native,
• breeding,
• common,
• aggressive,
• indigenous,
• daffy,
• determined,
• lisping,
• rare,
• unusual,
• slobbery,

Simple categories matching marine:

• organism,
• installation,
• market,
• science,
• invertebrate,
• canyon,
• item,
• port,
• fish,
• wonder,
• prokaryote,
• structure,
• particle,
• mammal,
• waterfowl,
• casualty,
• agent,
• fauna,
• system,
• wall,
• transport,
• sediment,
• eukaryote,
• monument,
• predator,
• condition,
• activity,
• jacks,
• oil,
• facility,
• service,
• reptile,
• seafood,
• vehicle,
• instrumentation,
• marker,
• establishment,
• plankton,
• food,
• weapon,
• valve,
• construction,
• phenomenon,
• energy,
• critter,
• meat,
• enclosure,
• animal,
• pollution,
• component,
• herbivore,
• gastropod,
• disturbance,
• object,
• safety,
• unit,
• geology,
• practice,
• disaster,
• accident,
• microbe,
• tank,
• pet,
• shorebird,
• wood,
• field,
• works,
• resource,
• location,
• event,
• flora,
• habitat,
• area,
• vertebrate,
• arthropod,
• borer,
• craft,
• issue,
• terminal,
• forecast,
• incident,
• fastener,
• fishery,
• prey,
• climate,
• production,
• part,
• mollusk,
• trade,
• zooplankton,
• microorganism,
• bag,
• biota,
• sport,
• instrument,
• relative,
• ray,
• community,
• dispute,
• rope,
• apparel,
• hazard,
• worm,
• duck,
• vessel,
• souvenir,
• property,
• product,
• insurance,
• surface,
• web,
• host,
• polysaccharide,
• mollusc,
• equipment,
• hardware,
• operations,
• recreation,
• protist,
• tern,
• algae,
• elements,
• lipid,
• extract,
• protection,
• endeavor,
• fossil,
• benthos,
• mineral,
• use,
• survey,
• giant,
• elasmobranch,
• clothing,
• phytoplankton,
• calamity,
• larva,
• curio,
• bivalve,
• flatfish,
• plant,
• bacteria,
• right,
• device,
• tourism,
• soil,
• substrate,
• application,
• crustacean,
• machinery,
• process,
• sector,
• occupation,
• traffic,
• drive,
• subject,
• biology,
• coating,
• force,
• species,
• profession,
• job,
• life,
• thing,
• cooperation,
• measurement,
• environment,
• embryo,
• bird,
• group,
• information,
• cnidarian,
• scavenger,
• weather,
• defence,
• engine,
• course,
• snail,
• pest,
• aquarium,
• transportation,
• beast,
• growth,
• rock,
• teleost,
• deposit,
• assets,
• shellfish,
• region,
• material,
• taxon,
• industry,
• neurotoxin,
• ship,