1. Capable of sealing itself as after being pierced
   "self-sealing tires" 
2. Seals without the application of moisture
   "self-sealing envelopes"

See also: adhesive, punctureless

• award-winning
• awarding
• aware
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• awash
• away
• away game
• awayness
• awe
• awe-inspiring
• aweary
• aweather
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• awesomeness
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• awestruck
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• awfulness
• awheel
• awhile