mud flat vs parcel

mud flat and parcel both are nouns.

Word	Noun	Adjective	Verb	Adverb
mud flat	Yes	No	No	No
parcel	Yes	No	Yes	No

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

mud flat: a tract of low muddy land near an estuary; covered at high tide and exposed at low tide
parcel: an extended area of land

Other hypernyms of mud flat include parcel of land, piece of ground, piece of land, tract.

mud flat (noun)	parcel (noun)
a tract of low muddy land near an estuary; covered at high tide and exposed at low tide	the allotment of some amount by dividing something
	a wrapped container
	a collection of things wrapped or boxed together
	an extended area of land

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