cheat vs shark

cheat and shark both are nouns.

Word	Noun	Adjective	Verb	Adverb
cheat	Yes	No	Yes	No
shark	Yes	No	Yes	No

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

Other hyponyms of cheat include job, rig, set up, cozen, crib, cook, fake, falsify, fudge, manipulate, misrepresent, wangle.

cheat (noun)	shark (noun)
a deception for profit to yourself	any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales
the act of swindling by some fraudulent scheme	a person who is unusually skilled in certain ways
someone who leads you to believe something that is not true	a person who is ruthless and greedy and dishonest
weedy annual grass often occurs in grainfields and other cultivated land; seeds sometimes considered poisonous
weedy annual native to Europe but widely distributed as a weed especially in wheat

cheat (verb)	shark (verb)
defeat someone through trickery or deceit	hunt shark
deprive somebody of something by deceit	play the shark; act with trickery
engage in deceitful behavior; practice trickery or fraud
be sexually unfaithful to one's partner in marriage