Human describes people or things typical of people, and it is also a noun for a person. Humane means kind and compassionate, especially towards those who are suffering. To err is human, but a vet aims to be humane.
The core difference
Human simply relates to people, while humane describes compassion for the pain of others.
- human — relating to people, or a person: It is only human to make mistakes sometimes.
- humane — showing compassion for suffering: The charity campaigns for the humane treatment of animals.
How to tell them apart
Here is a memory hook: humane ends in -ane, and you can think of it as human plus a kind heart. Human describes what we are; humane describes how we choose to behave towards others.
The mix-up appears in phrases such as humane treatment and human treatment. The first means kind treatment. The second would only mean treatment by or of people. Pronunciation also helps: human is stressed on the first syllable, while humane is stressed on the second.