railyard vs parcel

railyard and parcel both are nouns.

Word	Noun	Adjective	Verb	Adverb
railyard	Yes	No	No	No
parcel	Yes	No	Yes	No

As nouns, parcel is a hypernym of railyard; that is, parcel is a word with a broader meaning than railyard:

railyard: an area having a network of railway tracks and sidings for storage and maintenance of cars and engines
parcel: an extended area of land

Other hypernyms of railyard include parcel of land, piece of ground, piece of land, tract.

railyard (noun)	parcel (noun)
an area having a network of railway tracks and sidings for storage and maintenance of cars and engines	the allotment of some amount by dividing something
	a wrapped container
	a collection of things wrapped or boxed together
	an extended area of land

railyard (verb)	parcel (verb)
	make into a wrapped container
	cover with strips of canvas
	divide into parts