block vs jam

block and jam both are nouns.

Word	Noun	Adjective	Verb	Adverb
block	Yes	No	Yes	No
jam	Yes	No	Yes	No

As verbs, block and jam are synonyms defined as:

As verbs, jam is a hypernym of block; that is, jam is a word with a broader meaning than block:

Other hypernyms of block include block, close up, impede, obstruct, obturate, occlude.

As verbs, block and jam are synonyms defined as:

Other synonyms of block include close up, impede, obstruct, obturate, occlude.

block (noun)	jam (noun)
the act of obstructing or deflecting someone's movements	deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
a solid piece of something (usually having flat rectangular sides)	preserve of crushed fruit
an obstruction in a pipe or tube	a dense crowd of people
a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope	informal terms for a difficult situation
a metal casting containing the cylinders and cooling ducts of an engine
a platform from which an auctioneer sells
housing in a large building that is divided into separate units
an inability to remember or think of something you normally can do; often caused by emotional tension
a number or quantity of related things dealt with as a unit
a rectangular area in a city surrounded by streets and usually containing several buildings
(computer science) a sector or group of sectors that function as the smallest data unit permitted
a three-dimensional shape with six square or rectangular sides

block (verb)	jam (verb)
shape into a block or blocks	interfere with or prevent the reception of signals
shape by using a block	crowd or pack to capacity
prohibit the conversion or use of (assets)	get stuck and immobilized
be unable to remember	block passage through
interfere with or prevent the reception of signals	crush or bruise
impede the movement of (an opponent or a ball)	press tightly together or cram
render unsuitable for passage	push down forcibly
obstruct
stamp or emboss a title or design on a book with a block
support, secure, or raise with a block
block passage through
shut out from view or get in the way so as to hide from sight
interrupt the normal function of by means of anesthesia
hinder or prevent the progress or accomplishment of
stop from happening or developing
run on a block system