adults,    animals,    artiodactyl,    Artiodactyla,    bathes,    bathing,    catnapping,    catnaps,    clouded,    cloudiness,    clouds,    cloudy,    doze,    dozes,    dozing,    format,    grassland,    greenfield,    herds,    Hippopotamus,    hippos,    laterally,    lays,    lie,    lies,    mammals,    meadows,    move,    movement,    moves,    of,    outdoors,    outside,    pasture,    resting,    rests,    river,    riverhorses,    riverside,    shores,    sleep,    sleeps,    snoozes,    snoozing,    summerly,    summertime,    summery,    swimming,    swims,