conker conker /ˈkɒŋkər/

noun

1. The inedible nutlike seed of the horse chestnut  ( buckeye , conker , horse chestnut )
   the inedible nutlike seed of the horse chestnut
   
   

 spat spat /ˈspæt/

noun

1. A young oyster or other bivalve  ( spat )
   a young oyster or other bivalve
    At the oyster farm, they carefully nurtured each spat until it matured into a full-sized oyster.
   At the oyster farm, they carefully nurtured each spat until it matured into a full-sized oyster.
   
   
2. A cloth covering (a legging) that covers the instep and ankles  ( gaiter , spat )
   a cloth covering (a legging) that covers the instep and ankles
   
   
3. [Informal] A quarrel about petty points  ( bicker , fuss , pettifoggery , bickering , spat [Informal] , squabble , tiff [Informal] , brannigan [Informal, American] )
   a quarrel about petty points
   

verb

1. Clap one's hands together  ( spat , clap )
   clap one's hands together
    The children were clapping to the music
   The children were clapping to the music
   
2. Spawn  ( spat )
   spawn
    Oysters spat
   oysters spat
   
3. [Informal] Engage in a brief and petty quarrel  ( spat [Informal] )
   engage in a brief and petty quarrel
   
4. Clap one's hands or shout after performances to indicate approval  ( acclaim , spat , clap , applaud )
   clap one's hands or shout after performances to indicate approval
    The audience applauded the cast's performance, showing their appreciation with a standing ovation
   The audience applauded the cast's performance, showing their appreciation with a standing ovation
   
5. Strike with a sound like that of falling rain  ( spat )
   strike with a sound like that of falling rain
    Bullets were spatting the leaves
   Bullets were spatting the leaves
   
6. Become permanently attached  ( spat )
   become permanently attached
    Mollusks or oysters spat
   mollusks or oysters spat
   
7. Come down like raindrops  ( spat )
   come down like raindrops
    Bullets were spatting down on us
   Bullets were spatting down on us
   

 Io Io /ˈaɪoʊ/

noun

1. The closest of Jupiter's moons; has active volcanoes  ( Io )
   the closest of Jupiter's moons; has active volcanoes
    Io, with its volcanic activity, is one of the most fascinating moons of Jupiter.
   Io, with its volcanic activity, is one of the most fascinating moons of Jupiter.
   
   
2. (Greek mythology) a maiden seduced by Zeus; when Hera was about to discover them together Zeus turned her into a white heifer  ( Io )
   (Greek mythology) a maiden seduced by Zeus; when Hera was about to discover them together Zeus turned her into a white heifer
    To conceal his affair, Zeus transformed Io into a heifer.
   To conceal his affair, Zeus transformed Io into a heifer.
   
   

 ostiary ostiary /ˈɑːstiˌɛri/

noun

1. Someone who guards an entrance  ( door guard , doorkeeper , gatekeeper , doorman , hall porter , ostiary , porter )
   someone who guards an entrance
     The doorman warmly welcomed guests into the luxurious hotel.
   The doorman warmly welcomed guests into the luxurious hotel.
   
   
2. The lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church  ( doorkeeper , ostiarius , ostiary )
   the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church