If there are multiple Divine Beings (Elohim) which were called the Divine Council, and according to the Tanakh 'you've chosen one of them which your fathers didn't know' (Deuteronomy 32:15-18), that is still Henothiesm' - even if you believe the rest do not exist.
Henotheism comes from the etymology: Greek heis, henos 'one' + theos 'god' + -ism.