deceptive — deceitful:
Both these words mean ‘deceiving’ — cheating.

a deceptive advertisement
“Deceptive”, for the right pronunciation, please click here, means ‘having the power to deceive (cheat); misleading’,
Words or appearances that are “deceptive” may not be deliberately so, i.e. they are not done intentionally or on purpose.
e.g.
Appearances are deceptive. [It is a proverb to say that we may be deceived by the way a person looks; we come to conclusions, usually wrong ones, just by the way someone or something appears/the way how they look.]
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“Deceitful”, for the right pronunciation, please click here, means ‘dishonest’.
Words and/or behaviour of a person that are ‘deceitful’ may be intentional – done on purpose.
e.g.
He robbed the old woman of her money by his deceitful words. [i.e. he told the old woman lies and stole her money]
