Synonyms, Grade 7: Difficult

Learn this list of synonyms for difficult.
18 words 6 learners

Learn words with Flashcards and other activities

Definition First
Print Flashcards

Other learning activities

Answer a few questions about each word. Use this to prep for your next quiz! Compete with other teams in real time to see who answers the most questions correctly! Test your spelling acumen. Read the definition, listen to the word and try spelling it!

Teaching tools

Create and assign quizzes to your students to test their vocabulary. Assign learning activities including Practice, Vocabulary Jams and Spelling Bees to your students, and monitor their progress in real-time.

Full list of words from this list:

words only definitions & notes
  1. strenuous
    taxing to the utmost; testing powers of endurance
  2. arduous
    difficult to accomplish
  3. backbreaking
    characterized by effort to the point of exhaustion
  4. grueling
    characterized by effort to the point of exhaustion
  5. laborious
    characterized by effort to the point of exhaustion
  6. punishing
    characterized by effort to the point of exhaustion
  7. exhausting
    producing exhaustion
  8. wearying
    producing exhaustion
  9. toilsome
    characterized by effort to the point of exhaustion
  10. burdensome
    not easily borne or endured; causing hardship
  11. rigorous
    demanding strict attention to rules and procedures
  12. herculean
    extremely difficult; requiring great strength
  13. effortful
    requiring great physical effort
  14. demanding
    requiring more than usually expected or thought due
  15. taxing
    not easily borne; wearing
  16. uphill
    against difficulties
  17. challenging
    requiring full use of your abilities or resources
  18. onerous
    burdensome or difficult to endure
Created on Wed Feb 18 19:53:19 EST 2026 (updated Wed Feb 18 19:55:51 EST 2026)

Sign up now (it’s free!)

Whether you’re a teacher or a learner, Vocabulary.com can put you or your class on the path to systematic vocabulary improvement.