journey vs sledge

journey and sledge both are nouns.

Word	Noun	Adjective	Verb	Adverb
journey	Yes	No	Yes	No
sledge	Yes	No	Yes	No

As verbs, sledge is a hyponym of journey; that is, sledge is a word with a more specific, narrower meaning than journey:

Other hyponyms of journey include tour, globe-trot, navigate, sail, voyage, trek, trek.

journey (noun)	sledge (noun)
the act of traveling from one place to another	a heavy long-handled hammer used to drive stakes or wedges
	a vehicle mounted on runners and pulled by horses or dogs; for transportation over snow

journey (verb)	sledge (verb)
undertake a journey or trip	beat with a sledgehammer
travel upon or across	transport in a sleigh
	ride in or travel with a sledge