ardent

As adjectives the difference between ardent and irrational

is that ardent is full of ardor; fervent, passionate while irrational is not rational; unfounded or nonsensical.

As a noun irrational is

a real number that can not be expressed as the quotient of two integers, an irrational number.

As adjectives the difference between impulsive and ardent

is that impulsive is having the power of driving or impelling; giving an impulse; moving; impellent while ardent is full of ardor; fervent, passionate.

As a noun impulsive

is that which impels or gives an impulse; an impelling agent.

As adjectives the difference between ardent and fanatic

is that ardent is full of ardor; fervent, passionate while fanatic is fanatical.

As a noun fanatic is

a person who is zealously enthusiastic for some cause, especially in religion.

As an adjective ardent

is full of ardor; fervent, passionate.

As a verb exhilarated is

(exhilarate).

As a noun ambition

is ambition for some particular achievement.

As an adjective ardent is

full of ardor; fervent, passionate.

As adjectives the difference between formidable and ardent

is that formidable is causing fear, dread, awe or admiration as a result of size, strength, or some other impressive quality; commanding respect; causing wonder or astonishment while ardent is full of ardor; fervent, passionate.

As adjectives the difference between ardent and undefined

is that ardent is full of ardor; fervent, passionate while undefined is lacking a definition or value.

As an adjective ardent

is full of ardor; fervent, passionate.

As a verb enthused is

past participle of enthuse.

Acrimonious is a related term of ardent.

As adjectives the difference between acrimonious and ardent

is that acrimonious is angry, acid, and sharp in delivering argumentative replies: bitter; mean-spirited; sharp in language or tone while ardent is full of ardor; fervent, passionate.