alluvium vs sediment

alluvium and sediment both are nouns.

Word	Noun	Adjective	Verb	Adverb
alluvium	Yes	No	No	No
sediment	Yes	No	Yes	No

As nouns, sediment is a hypernym of alluvium; that is, sediment is a word with a broader meaning than alluvium:

alluvium: clay or silt or gravel carried by rushing streams and deposited where the stream slows down
sediment: matter that has been deposited by some natural process

Other hypernyms of alluvium include deposit.

alluvium (noun)	sediment (noun)
clay or silt or gravel carried by rushing streams and deposited where the stream slows down	matter that has been deposited by some natural process

alluvium (verb)	sediment (verb)
	settle as sediment
	deposit as a sediment