What is the difference between ignition temperature and flash point?
From Wikipedia:

Autoignition Temperature: the lowest temperature at which a substance spontaneously ignites without a source of ignition (such as a flame or spark).

Flash Point: the lowest temperature at which the vapours of a (volatile) material will ignite, with an ignition source.

Ignition temperature means the same thing as autoignition temperature according to Merriam Webster.