Jehovah vs hypostasis

Jehovah and hypostasis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jehovah	Yes	No	No	No
hypostasis	Yes	No	No	No

As nouns, hypostasis is a hyponym of Jehovah; that is, hypostasis is a word with a more specific, narrower meaning than Jehovah:

Jehovah: terms referring to the Judeo-Christian God
hypostasis: any of the three persons of the Godhead constituting the Trinity especially the person of Christ in which divine and human natures are united

Other hyponyms of Jehovah include Blessed Trinity, Holy Trinity, Sacred Trinity, Trinity, hypostasis of Christ.

Jehovah (noun)	hypostasis (noun)
a name for the God of the Old Testament as transliterated from the Hebrew consonants YHVH	(metaphysics) essential nature or underlying reality
terms referring to the Judeo-Christian God	any of the three persons of the Godhead constituting the Trinity especially the person of Christ in which divine and human natures are united
	the accumulation of blood in an organ
	the suppression of a gene by the effect of an unrelated gene