Malachi vs Malachias

Malachi and Malachias both are nouns.

Word	Noun	Adjective	Verb	Adverb
Malachi	Yes	No	No	No
Malachias	Yes	No	No	No

As nouns, Malachi and Malachias are synonyms defined as:

Malachi and Malachias: an Old Testament book containing the prophecies of Malachi

Other synonyms of Malachi include Book of Malachi.

As nouns, Malachi and Malachias are synonyms defined as:

Malachi (noun)	Malachias (noun)
an Old Testament book containing the prophecies of Malachi	an Old Testament book containing the prophecies of Malachi
a Hebrew minor prophet of the 5th century BC	a Hebrew minor prophet of the 5th century BC