1. The act of dissevering; separation
   - disseverance

Derived forms: disseverments

• on-the-scene
• onager
• Onagraceae
• onanism
• onanist
• once
• once again
• once and for all
• once in a blue moon
• once in a while
• once more
• once upon a time
• once-over
• onchocerciasis
• oncidium
• Oncidium papilio
• Oncidium papilio kramerianum
• oncogene
• oncologic
• oncological
• oncologist
• oncology
• oncoming
• Oncorhynchus
• Oncorhynchus keta