What is another word for

challenging

challenging as in requiring full use of your abilities or resources
  • "ambitious schedule"
  • "performed the most challenging task without a mistake"

Synonyms

  • ambitioushaving a strong desire for success or achievement ; requiring full use of your abilities or resources
challenging as in stimulating interest or thought
  • "a challenging hypothesis"
  • "a thought-provoking book"

Synonyms

  • thought-provokingstimulating interest or thought
challenging as in disturbingly provocative
  • "an intriguing smile"

Synonyms

  • intriguingdisturbingly provocative; capable of arousing interest or curiosity