version vs surtitle

version and surtitle both are nouns.

Word	Noun	Adjective	Verb	Adverb
version	Yes	No	No	No
surtitle	Yes	No	No	No

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

version: a written communication in a second language having the same meaning as the written communication in a first language
surtitle: translation of the words of a foreign opera (or choral work) projected on a screen above the stage

Other hyponyms of version include mistranslation, crib, pony, trot, retroversion, caption, subtitle, supertitle.

version (noun)	surtitle (noun)
manual turning of a fetus in the uterus (usually to aid delivery)	translation of the words of a foreign opera (or choral work) projected on a screen above the stage
a mental representation of the meaning or significance of something
something a little different from others of the same type
a written communication in a second language having the same meaning as the written communication in a first language
an interpretation of a matter from a particular viewpoint
a written work (as a novel) that has been recast in a new form