All challenging synonyms

adjective challenging

• demanding — A demanding job or task requires a lot of your time, energy, or attention.
• taxing — wearingly burdensome: the day-to-day, taxing duties of a supervisor.
• testing — the means by which the presence, quality, or genuineness of anything is determined; a means of trial.
• difficult — not easily or readily done; requiring much labor, skill, or planning to be performed successfully; hard: a difficult job.
• tough — strong and durable; not easily broken or cut.
• trying — extremely annoying, difficult, or the like; straining one's patience and goodwill to the limit: a trying day; a trying experience.
• tricky — given to or characterized by deceitful tricks; crafty; wily.
• stimulating — to rouse to action or effort, as by encouragement or pressure; spur on; incite: to stimulate his interest in mathematics.
• interesting — engaging or exciting and holding the attention or curiosity: an interesting book.
• inspiring — to fill with an animating, quickening, or exalting influence: His courage inspired his followers.
• puzzling — confusing or baffling: a puzzling answer.
• perplexing — to cause to be puzzled or bewildered over what is not understood or certain; confuse mentally: Her strange response perplexed me.
• defiant — If you say that someone is defiant, you mean they show aggression or independence by refusing to obey someone.
• disobedient — neglecting or refusing to obey; not submitting; refractory.
• rebellious — defying or resisting some established authority, government, or tradition; insubordinate; inclined to rebel.
• insolent — boldly rude or disrespectful; contemptuously impertinent; insulting: an insolent reply.
• impudent — of, relating to, or characterized by impertinence or effrontery: The student was kept late for impudent behavior.
• bold — Bold lines or designs are drawn in a clear, strong way.