insan: human insanlar: people, a mass of humans insanlık: 1humanity, 2humankind insancıl: humanist İnsanlar hafta sonları daha çok alışveriş yapıyorlar. (People shop at weekends much more.) kişi : person, head kişilik: personality kişisel: personal kişi başı: per head Otobüste kaç kişi vardı? (How many people were there in the bus?)

You can use "kişi" as individual as well. It usually gives information about a situation or number of people...

insan means human, kişi means person but sometimes insan is also used as person. example (similarity): "orada çok insan var mı?" = "orada çok kişi var mı?" = "are there many people?" example (difference): "insan bencil bir varlıktır." = "human is a selfish creature." (we cannot use kişi here; because kişi is not a creature) "bir kişi sizi görmeye geldi." = "a person has come to see you." (we cannot use insan here; because it would be weird to say "a human has come to see you" -as if an alien could have come too :D ok it can happen in a movie, why not -)