Modifiers matching duck:

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

Simple categories matching unusual:

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