Terminal Illness Cover is a feature of life insurance that allows for the early payout of Life Insurance - so the 'Death Benefit' - as it's called - is paid out when the policyholder is diagnosed with less than 12 months to live - rather than after they die. (The early payout that Terminal Illness Cover provides may assist policyholders in putting their affairs in order).
Critical Illness Cover is a different type of cover that pays the policyholder if they're diagnosed with one the illnesses listed in the policy. There are usually up to fifty illnesses specified in a policy and although they're not necessarily fatal - for example heart attack, blindness or cancer - each would have a significant - critical - impact on the policyholder's life. A Critical Illness benefit might allow policyholders to buy treatment, pay off a mortgage or make home modifications, for example.
Read about Critical Illness Cover