obstacle course

weekend

ropes course

challenge (against authority or a higher-ranked person) / (figuratively) try at something

to challenge / (figuratively) to take on the challenge of doing something (especially something one has not done before); to try; to try one's hand at

field, land area / the field in track and field / field, area for playing a game / field in mathematics / field in geology / field in computing

Field

(chiefly women's speech) first person singular pronoun: I, me

field hockey

(polite) first-person singular pronoun: I, me