know - be able to distinguish, recognize as being different; "The child knows right from wrong"

identify, place - recognize as being; establish the identity of someone or something; "She identified the man on the 'wanted' poster"

discriminate, know apart - recognize or perceive the difference

label - distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions

label - distinguish (as a compound or molecule) by introducing a labeled atom

sex - tell the sex (of young chickens)

individualise, individualize - make or mark aor treat as individual; "The sounds were individualized by sharpness and tone"

contrast - put in opposition to show or emphasize differences; "The middle school teacher contrasted her best student's work with that of her weakest student"

severalise, severalize - distinguish or separate

contradistinguish - distinguish by contrasting qualities

decouple, dissociate - regard as unconnected; "you must dissociate these two events!"; "decouple our foreign policy from ideology"

demarcate - separate clearly and as if by boundaries

discriminate, single out, separate - treat differently on the basis of sex or race

stratify - divide society into social classes or castes; "Income distribution often stratifies a society"