choke off vs silt

choke off is not a noun while silt is a noun.

Word	Noun	Adjective	Verb	Adverb
choke off	No	No	Yes	No
silt	Yes	No	Yes	No

As verbs, silt is a hyponym of choke off; that is, silt is a word with a more specific, narrower meaning than choke off:

Other hyponyms of choke off include gum up, block, choke up, lug, stuff, silt up.

choke off (noun)	silt (noun)
	mud or clay or small rocks deposited by a river or lake

choke off (verb)	silt (verb)
suppress	become chocked with silt
become or cause to become obstructed