Synonyms - achivement and difficulty

Question 1

Challenge for a long time, an attempt or effort to do something

Answer 1

Trial / Ordeal

Question 2

Something that prevents or slows progress

Answer 2

Obstacle / Hurdle

Question 3

To take upon oneself a task

Answer 3

Undertaking / Mission

Question 4

An exciting or very unusual experience

Answer 4

Exploits / Adventures

Question 5

Something done admirably or creditably

Answer 5

Accomplishment / Feat