How are the central ideas of Hinduism and Buddhism alike?

For one thing, both believe in Karma and reincarnation and the cycle of life for each soul. Both have a lot of aspects regarding the illusory state of the world and how our senses aren't all that good and that we should separate ourselves from material things. Both feature strong ideas about the connection of all organisms and pacifism and avoiding to hurt others. These are the basic ones but there are more similarities.