mare's nest vs welter

mare's nest and welter both are nouns.

Word	Noun	Adjective	Verb	Adverb
mare's nest	Yes	No	No	No
welter	Yes	No	Yes	No

As nouns, mare's nest and welter are synonyms defined as:

Other synonyms of mare's nest include clutter, fuddle, jumble, muddle, smother.

mare's nest (noun)	welter (noun)
a confused multitude of things	a confused multitude of things

mare's nest (verb)	welter (verb)
	be immersed in
	roll around
	toss, roll, or rise and fall in an uncontrolled way