Adversary(noun)

-an opponent or enemySynonym-rivalAntonyms-team mate The blue team looked over at their adversary with glares.

Aplomb(noun)

-self-confident in a difficult situationSynonym-braveAntonyms-cowardThe person with aplomb was the most

daring out of the group.

Apprehensive(adj.)

-Anxious or fearful; uneasySynonym-afraidAntonym- confidentDanny was very apprehensive when he confronted the bully.

Fragrance(noun)

-a sweet or pleasant scentSynonym-aromaAntonym-odor-The fragrance that was coming out of the kitchen was irresistible.

Furtive(adj.)

-Sneaky; acting in a way so as not to be noticedSynonym-stealthyAntonym-noticeable-The furtive fox crept across the road barely missing the truck.

Grueling(adj.)

-physically or mentally exhausting; very hard to doSynonym-challengingAntonym-effortless - Lifting the crates is a grueling job; that is why we left it for Henry.

Potential(noun)

-ability to grow, develop or improve; possibilitySynonym-growAntonym-stopThe boy had great potential; he would go on to do great things in life.

Precipice(adj.)

-very steep overhanging rock; edge of a cliffSynonym-peekAntonym-bottomMy mom said that we had to hike all the way up to the precipice, but she warned us to stay away from the edge.

Pristine(adj.)

-In a pure or unspoiled state; untouchedSynonym-cleanAntonym-dingyWhen we walked into the hotel room, it was in pristine condition; everything was brand new.