Modifiers matching bird:

• unusual,
• important,
• altricial,
• wild,
• small,
• smaller,
• piscivorous,
• spectacular,
• flying,
• samoan,
• large,
• passive,
• larger,
• lightweight,
• level,
• walking,
• exotic,
• edible,
• domesticated,
• outdoor,
• desired,
• northern,
• british,
• diverse,
• skinned,
• diurnal,
• world,
• interior,
• migratory,
• flightless,
• young,
• captive,
• japanese,
• out,
• moving,
• predatory,
• unclean,
• sick,
• canadian,
• indoor,
• european,
• marine,
• undesirable,
• social,
• extinct,
• fabulous,
• dominant,
• popular,
• off,
• american,
• indigenous,
• highland,
• colonial,
• immature,
• nonnative,
• foreign,
• bigger,
• useful,
• soaring,
• upland,
• beaked,
• nocturnal,
• special,
• primordial,
• montane,
• mimic,
• omnivorous,
• himalayan,
• raptorial,
• kosher,
• arctic,
• dead,
• breeding,
• abundant,
• higher,
• maritime,
• basal,
• rich,
• strong,
• stuffed,
• heavy,
• precocial,
• terrestrial,
• clean,
• susceptible,
• pelagic,
• dependant,
• auspicious,
• noisier,
• intelligent,
• high,
• fierce,
• african,
• colorful,
• fantastic,
• nonmigratory,
• resident,
• whole,
• elusive,
• distinctive,
• plain,
• oceangoing,
• domestic,
• black,
• threatened,
• home,
• insectivorous,
• bodied,
• lower,
• finicky,
• polar,
• curious,
• colombian,
• carnivorous,
• powerful,
• regular,
• antarctic,
• gallinaceous,
• suburban,
• transitory,
• colourful,
• primitive,
• noxious,
• unwanted,
• weaker,
• everyday,
• modern,
• roasted,
• jurassic,
• sized,
• riparian,
• sedentary,
• rare,
• endemic,
• tall,
• invasive,
• passerine,
• english,
• beautiful,
• medium,
• cuban,
• mobile,
• amazing,
• harmless,
• good,
• heavier,
• fast,
• coastal,
• tropical,
• familiar,
• local,
• undecomposed,
• estuarine,
• majestic,
• gregarious,
• white,
• injured,
• real,
• bully,
• evil,
• urban,
• hollow,
• herbivorous,
• migrant,
• typical,
• australian,
• handsome,
• symbolic,
• common,
• feral,
• visible,
• interesting,
• unique,
• tiny,
• parrotlike,
• agile,
• inconspicuous,
• size,
• frozen,
• flighted,
• raised,
• big,
• dark,
• magnificent,
• free,
• aggressive,
• vibrant,
• cute,
• pink,
• seasonal,
• native,

Simple categories matching hollow:

• cylinder,
• fibre,
• object,
• bird,
• article,
• stem,
• tube,
• sphere,
• structure,
• tubing,
• passage,
• ceiling,
• item,
• cavity,
• part,
• carrier,
• organ,
• wood,
• jewelry,
• vessel,
• receptacle,
• formation,
• animal,
• section,
• space,
• ware,
• pipe,
• fiber,
• container,
• form,
• reed,
• particle,
• glass,
• component,
• thing,
• piece,
• instrument,
• handgrip,
• body,
• beads,
• material,
• shaft,
• assembly,
• viscera,
• needle,
• dish,
• surface,
• viscus,
• area,
• pole,
• implement,
• product,
• shape,
• glassware,
• construction,
• shell,
• utensil,
• bone,
• tree,
• plant,
• bones,
• organs,
• polyhedron,
• conduit,
• protuberance,
• ball,
• wall,
• feature,
• region,
• panel,
• tissue,