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

See also: strong

• flog a dead horse
• flogger
• flogging
• flokati
• flong
• flood
• flood control
• flood in
• flood lamp
• flood out
• flood tide
• flooded
• flooded gum
• floodgate
• floodhead
• flooding
• floodlight
• floodlighted
• floodlit
• floodplain
• floodwater
• floor
• floor cover
• floor covering
• floor joist