• categorize
• taxonomic category
• people
• society
• pedagogy
• class chondrichthyes
• ciliata
• crossopterygii
• teleostei
• ninja

class amphibia  class angiospermae  class act  class anthozoa  class anthoceropsida  class action  class arachnida  class acrasiomycetes  class aphasmidia  class actinozoa