metencephalon vs hindbrain

metencephalon and hindbrain both are nouns.

Word	Noun	Adjective	Verb	Adverb
metencephalon	Yes	No	No	No
hindbrain	Yes	No	No	No

As nouns, hindbrain is a hypernym of metencephalon; that is, hindbrain is a word with a broader meaning than metencephalon:

metencephalon: the part of the hindbrain that develops into the pons and the cerebellum
hindbrain: the posterior portion of the brain including cerebellum and brainstem

Other hypernyms of metencephalon include rhombencephalon.

metencephalon (noun)	hindbrain (noun)
the part of the hindbrain that develops into the pons and the cerebellum	the posterior portion of the brain including cerebellum and brainstem