1. Extremely strong or concentrated or durable
   "industrial-strength detergent"
   - weapons-grade

See also: strong

• obscurely
• obscureness
• obscurity
• obsecrate
• obsequious
• obsequiously
• obsequiousness
• obsequy
• observable
• observably
• observance
• observant
• observantly
• observation
• observation dome
• observation post
• observation station
• observation tower
• observational
• observator
• observatory
• observe
• observed
• observed fire
• observer