detection (n.)

• catching
• determination
• disclosure
• discovery
• espial
• excavation
• exhumation
• exposure
• find
• finding
• hearing
• interception
• invention
• investigation
• locating
• location
• probe
• ranging
• recognition
• rediscovery
• research
• revelation
• serendipity
• sifting
• sleuthing
• spotting
• strike
• trove
• uncovering
• witch-hunt