fanatical

As adjectives the difference between fickle and fanatical

is that fickle is quick to change one’s opinion or allegiance; insincere; not loyal or reliable while fanatical is having an extreme, irrational zeal or enthusiasm for a specific cause.

As a verb fickle

is to deceive; flatter.

As an adjective fanatical is

having an extreme, irrational zeal or enthusiasm for a specific cause.

As adjectives the difference between fanatical and unreasonable

is that fanatical is having an extreme, irrational zeal or enthusiasm for a specific cause while unreasonable is not reasonable.

As adjectives the difference between frenetic and fanatical

is that frenetic is fast, harried; having extreme enthusiasm or energy while fanatical is having an extreme, irrational zeal or enthusiasm for a specific cause.

As a noun frenetic

is one who is frenetic.

Fanatical is a related term of furious.

As adjectives the difference between fanatical and furious

is that fanatical is having an extreme, irrational zeal or enthusiasm for a specific cause while furious is transported with passion or fury; raging; violent.

As an adjective fanatical

is having an extreme, irrational zeal or enthusiasm for a specific cause.

As adjectives the difference between fanatical and financial

is that fanatical is having an extreme, irrational zeal or enthusiasm for a specific cause while financial is related to finances.

As adjectives the difference between fanatical and persistent

is that fanatical is having an extreme, irrational zeal or enthusiasm for a specific cause while persistent is obstinately refusing to give up or let go.

As an adjective fanatical

is having an extreme, irrational zeal or enthusiasm for a specific cause.

As a verb fanaticize is

to make into a fanatic.