Modifiers matching duck:

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

Simple categories matching unusual:

• material,
• organs,
• means,
• event,
• operations,
• circumstances,
• ability,
• animal,
• pet,
• pathology,
• attribute,
• fibre,
• category,
• thing,
• touch,
• sport,
• system,
• condition,
• fixture,
• smell,
• illness,
• item,
• herb,
• topic,
• cost,
• symptom,
• occurrence,
• noise,
• tulip,
• entity,
• seed,
• wood,
• tree,
• pipe,
• creature,
• structure,
• ingredient,
• motion,
• experience,
• textile,
• bill,
• fiber,
• host,
• flute,
• flavour,
• recording,
• gun,
• area,
• stone,
• layout,
• beer,
• use,
• marking,
• design,
• wound,
• sweetener,
• tremor,
• nature,
• suspect,
• outlet,
• museum,
• meat,
• happening,
• organ,
• mixture,
• group,
• invertebrate,
• losses,
• windows,
• home,
• flavoring,
• fabric,
• battery,
• stain,
• rock,
• domain,
• predator,
• sensation,
• boat,
• combination,
• piece,
• discomfort,
• papers,
• opponent,
• turtle,
• danger,
• compound,
• site,
• story,
• substrate,
• woodwind,
• shock,
• basil,
• drink,
• region,
• change,
• disturbance,
• deposit,
• grain,
• key,
• transaction,
• thought,
• behaviour,
• music,
• flora,
• installation,
• behavior,
• suicide,
• ulcer,
• disease,
• legs,
• complication,
• tumor,
• variation,
• cycle,
• reaction,
• pathogen,
• shape,
• dance,
• art,
• color,
• spice,
• tool,
• building,
• delicacy,
• size,
• container,
• niche,
• value,
• instance,
• medium,
• option,
• watch,
• infection,
• object,
• idea,
• equipment,
• constituent,
• pest,
• prey,
• restaurant,
• place,
• vegetation,
• quality,
• component,
• plant,
• alloy,
• dish,
• vehicle,
• collection,
• flooring,
• pattern,
• obstruction,
• festival,
• acid,
• leaf,
• sign,
• portion,
• stem,
• situation,
• atom,
• malignancy,
• hazard,
• chemical,
• product,
• movement,
• entertainment,
• circumstance,
• environment,
• character,
• document,
• storm,
• space,
• odor,
• fear,
• yarn,
• decoration,
• appearance,
• bacteria,
• livestock,
• flavouring,
• species,
• toy,
• accident,
• gem,
• tumour,
• service,
• state,
• scent,
• requirement,
• tradition,
• process,
• case,
• gemstone,
• fruit,
• occasion,
• trade,
• cause,
• tissue,
• fare,
• mineral,
• facility,
• problem,
• sound,
• property,
• wine,
• action,
• ornamentation,
• competition,
• typeface,
• response,
• disorder,
• perception,
• coral,
• procedure,
• phenomenon,
• treatment,
• formation,
• vegetable,
• business,
• wool,
• obstacle,
• sauce,
• odour,
• metal,
• stuff,
• climate,
• cheese,
• spirits,
• merchandise,
• neoplasm,
• difficulty,
• measure,
• pizza,
• shade,
• fish,
• bird,
• location,
• trait,
• feature,
• word,
• car,
• antiquity,
• mammal,
• layer,
• salt,
• truck,
• interest,
• cancer,
• filling,
• ornamental,
• weather,
• oddity,
• skill,
• soap,
• power,
• instrumentation,
• assets,
• commodity,
• symbol,
• weapon,
• instrument,
• gift,
• food,
• contingency,
• surface,
• critter,
• insect,
• vessel,
• joint,
• accessory,
• flavor,
• duck,
• incident,
• contaminant,
• lily,
• scene,
• conformation,
• expenditure,
• flower,
• hardwood,
• style,
• activity,
• conifer,
• project,
• individual,
• wind,
• chocolate,
• fluid,
• organism,
• aroma,
• substance,
• characteristic,