1. Last in an indefinitely numerous series
   - umpteenth, umptieth

See also: ordinal

• atopognosis
• atopy
• atorvastatin
• atoxic
• ATP
• atrabilious
• choc
• choc-ice
• chocaholic
• choccy
• chock
• chock up
• chock-full
• chocka
• chockablock
• chocker
• chockers
• chockful
• chocoholic
• chocolate
• chocolate bar
• chocolate cake
• chocolate candy
• chocolate chip cookie
• chocolate eclair