voyage vs maiden voyage

voyage and maiden voyage both are nouns.

Word	Noun	Adjective	Verb	Adverb
voyage	Yes	No	Yes	No
maiden voyage	Yes	No	No	No

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

Other hyponyms of voyage include cruise, sail.

voyage (noun)	maiden voyage (noun)
a journey to some distant place	the first voyage of its kind
an act of traveling by water

voyage (verb)	maiden voyage (verb)
travel on water propelled by wind or by other means