alluvial deposit vs alluvial sediment

alluvial deposit and alluvial sediment both are nouns.

Word	Noun	Adjective	Verb	Adverb
alluvial deposit	Yes	No	No	No
alluvial sediment	Yes	No	No	No

As nouns, alluvial deposit and alluvial sediment are synonyms defined as:

alluvial deposit and alluvial sediment: clay or silt or gravel carried by rushing streams and deposited where the stream slows down

Other synonyms of alluvial deposit include alluvion, alluvium.

alluvial deposit (noun)	alluvial sediment (noun)
clay or silt or gravel carried by rushing streams and deposited where the stream slows down	clay or silt or gravel carried by rushing streams and deposited where the stream slows down