jam vs choke off

jam is a noun but choke off is not a noun.

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

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

jam (noun)	choke off (noun)
deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
preserve of crushed fruit
a dense crowd of people
informal terms for a difficult situation

jam (verb)	choke off (verb)
interfere with or prevent the reception of signals	suppress
crowd or pack to capacity	become or cause to become obstructed
get stuck and immobilized
block passage through
crush or bruise
press tightly together or cram
push down forcibly