• categorize
• teaching
• taxonomic group
• society
• categorise
• catalog
• class flagellata
• subclass rosidae
• liliopsida
• magnoliophyta

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