90 Adjectives That Start With “O”

“O” adjectives offer a whole spectrum of positivity for you to play with. Are you having an okay time or an outstanding time? With the right positive adjective, your jewelry can be ornate or opalescent, and you can be more optimistic and outgoing.

Unfortunately, not all moments call for positivity. Sometimes, you need a negative adjective starting with “O” to describe any objectionable offenses, obscene occasions, or odious occurrences.

Of course, most of life isn’t just positive or negative. Most people, places, and objects just exist, but that doesn’t mean they should go without some good descriptors. From odd cookies to omnivorous bears, “O” adjectives offer plenty of optional ornaments for your nouns.

Plenty of the adjectives above offer some excellent, obvious descriptors for people, but it doesn’t hurt to arm yourself with plenty of official “O” adjectives to describe a person.

Knowing all these adjectives that start with “O” is just half the battle. You have to learn how to actually use them until you feel overconfident and overqualified.

1. My open-minded friend was willing to try just about anything at least once.
2. I had the onerous task of alphabetizing all of our spices and condiments.
3. She made a one-of-a-kind mug in her ceramics class.
4. Despite his offbeat personality, he was extremely relatable and easy to get along with.
5. He was ashamed of the glass cup that had gotten increasingly opaque from sitting on his desk for so long.
6. After weeks of being under construction, the elevator was finally operable.
7. The obnoxious combination of screaming kids and someone practicing the bagpipes made it hard for him to get any rest.
8. He was worried about the ominous work email that simply read, “Do you have time to talk?”
9. Aside from the occasional pepperoni pizza, his diet was mostly vegetarian.
10. The oppressive heat made it hard for her to want to do anything other than read in an air-conditioned cafe.
11. The French fries were oily, but that’s exactly how he liked them.
12. Our outgoing friend was always talking to strangers and making friends with store workers.
13. This seemed like an opportune moment to remind the kids not to push and shove each other when the bell rang.
14. The final exam involved a written test and an oral presentation.
15. Whenever he felt himself losing hope, he talked to his optimistic friend.
16. She appreciated the fine artistry and ornate details in the statue.
17. The camp ranger taught us about the omnivorous bears that loved to eat meat, roots, and marshmallows.
18. The overjoyed team learned they had two days off this week.
19. The whole class did such an outstanding job on the test that she told them they’d have pizza and ice cream to celebrate.
20. They spent two hours discussing the optimum amount of salsa for tortilla chips.

With your brain overloaded with adjectives starting with “O,” you can expand your vocabulary further with other parts of speech. Learning more words that start with “O” will improve your writing and conversational abilities, and it just might help you get the winning score in your word games.

• Nouns That Start With “O”
• Verbs That Start With “O”
• “O” Words for Word Games