block vs foul

block and foul both are nouns.

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

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

Other hypernyms of block include back up, choke, choke off, clog, clog up, congest, crap up.

As verbs, foul is a hyponym of block; that is, foul is a word with a more specific, narrower meaning than block:

block (noun)	foul (noun)
the act of obstructing or deflecting someone's movements	an act that violates the rules of a sport
a solid piece of something (usually having flat rectangular sides)
an obstruction in a pipe or tube
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
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 (adjective)	foul (adjective)
	(of a baseball) not hit between the foul lines
	disgustingly dirty; filled or smeared with offensive matter
	characterized by obscenity
	(of a manuscript) defaced with changes
	offensively malodorous
	highly offensive; arousing aversion or disgust
	especially of a ship's lines etc
	violating accepted standards or rules

block (verb)	foul (verb)
shape into a block or blocks	become soiled and dirty
shape by using a block	make unclean
prohibit the conversion or use of (assets)	spot, stain, or pollute
be unable to remember	make impure
interfere with or prevent the reception of signals	commit a foul; break the rules
impede the movement of (an opponent or a ball)	hit a foul ball
render unsuitable for passage	become or cause to become obstructed
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