1. Fit to be certified as insane (and treated accordingly)
   - certified 
2. Capable of being guaranteed or certified
   "a certifiable fact"

See also: certified, certify, insane

• Ajaia ajaja
• ajar
• Ajax
• Ajuga
• Ajuga chamaepitys
• Ajuga genevensis
• Ajuga pyramidalis
• Ajuga reptans
• AK
• AK-47
• Akaba
• Akan
• akaryocyte
• akaryote
• akathisia
• akee
• akee tree
• Akela
• Aken
• Akeridae
• Akha
• Akhbari
• Akhenaten
• Akhenaton
• akimbo