identification

[1]	connection , designation , recognition , distinguishing , indication , perception , detection , selection , naming , labelling , pinpointing , designation , characterization , denomination , authentication , verification , establishment , certification , substantiation , corroboration , (Colloq) fingering
[2]	classification , classifying , cataloguing , categorization , categorizing , pigeon-holing
[3]	ID , ID card , identity card , badge , credentials
[4]	connection , recognition , association , affiliation , empathy , sympathy , rapport , relationship