Modifiers matching duck:

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

Simple categories matching marine:

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