rummage vs welter

rummage and welter both are nouns.

Word	Noun	Adjective	Verb	Adverb
rummage	Yes	No	Yes	No
welter	Yes	No	Yes	No

As nouns, welter is a hypernym of rummage; that is, welter is a word with a broader meaning than rummage:

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

rummage (noun)	welter (noun)
a thorough search for something (often causing disorder or confusion)	a confused multitude of things
a jumble of things to be given away

rummage (verb)	welter (verb)
search haphazardly	be immersed in
	roll around
	toss, roll, or rise and fall in an uncontrolled way