crumble vs weather

crumble is not a noun while weather is a noun.

Word	Noun	Adjective	Verb	Adverb
crumble	No	No	Yes	No
weather	Yes	Yes	Yes	No

As verbs, weather is a hyponym of crumble; that is, weather is a word with a more specific, narrower meaning than crumble:

crumble (noun)	weather (noun)
	the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation

crumble (adjective)	weather (adjective)
	towards the side exposed to wind

crumble (verb)	weather (verb)
break or fall apart into fragments	change under the action or influence of the weather
fall into decay or ruin	cause to slope
fall apart	sail to the windward of
	face and withstand with courage