wilful

As a verb deceived

is (deceive).

As an adjective wilful is

intentional; deliberate.

As adjectives the difference between wilful and intemperate

is that wilful is intentional; deliberate while intemperate is lacking moderation, temper or control.

As a verb intemperate is

(obsolete|transitive) to disorder.

As adjectives the difference between wilful and woeful

is that wilful is intentional; deliberate while woeful is full of woe; sorrowful; distressed with grief or calamity.

As an adverb arbitrarily

is in an arbitrary manner.

As an adjective wilful is

intentional; deliberate.

As adjectives the difference between adamant and wilful

is that adamant is firm; unshakeable; unyielding; determined while wilful is intentional; deliberate.

As a noun adamant

is an imaginary rock or mineral of impenetrable hardness; a name given to the diamond and other substances of extreme hardness.

Wilful is a related term of whimsical.

As adjectives the difference between wilful and whimsical

is that wilful is intentional; deliberate while whimsical is given to whimsy; capricious; odd; peculiar; playful; light-hearted or amusing.

Wilful is a related term of obdurate.

As adjectives the difference between wilful and obdurate

is that wilful is intentional; deliberate while obdurate is stubbornly persistent, generally in wrongdoing; refusing to reform or repent.

Naughty is a synonym of wilful.

As adjectives the difference between naughty and wilful

is that naughty is while wilful is intentional; deliberate.

As adjectives the difference between wishful and wilful

is that wishful is (obsolete) wished-for; desired, wanted while wilful is intentional; deliberate.

As adjectives the difference between negligent and wilful

is that negligent is negligent (culpable due to negligence) while wilful is intentional; deliberate.