smother vs rummage

smother and rummage both are nouns.

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

As nouns, rummage is a hyponym of smother; that is, rummage is a word with a more specific, narrower meaning than smother:

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

smother (verb)	rummage (verb)
deprive of oxygen and prevent from breathing	search haphazardly
suppress in order to conceal or hide
envelop completely
deprive of the oxygen necessary for combustion
form an impenetrable cover over