Bel-Merodach vs Merodach

Bel-Merodach and Merodach both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bel-Merodach	Yes	No	No	No
Merodach	Yes	No	No	No

As nouns, Bel-Merodach and Merodach are synonyms defined as:

Bel-Merodach and Merodach: the chief Babylonian god; his consort was Sarpanitu

Other synonyms of Bel-Merodach include Baal Merodach, Marduk.

Bel-Merodach (noun)	Merodach (noun)
the chief Babylonian god; his consort was Sarpanitu	the chief Babylonian god; his consort was Sarpanitu