abecedarian /ā-bi-sē-dāˈri-ən/

1. Relating to the ABC
2. Rudimentary
3. Arranged in the manner of an acrostic

1. A learner of the ABC, a beginner
2. A teacher of the ABC
3. An Anabaptist of a sect that rejected all learning

• obliteration
• obliterations
• obliterative
• obliterator
• obliterators
• oblivion
• oblivions
• oblivious
• obliviously
• obliviousness
• obliviousnesses
• obliviscence
• obliviscences
• Oblomovism
• oblong
• oblongs
• obloquies
• obloquy
• obmutescence
• obmutescences
• obmutescent
• obnoxious
• obnoxiously
• obnoxiousness
• obnoxiousnesses