ISEE/SSAT Vocabulary BuilderWordsO
ISEE & SSAT vocabulary words starting with O
40 words from the 1,500-word ISEE and SSAT deck, each with its meaning. Open a word for example sentences, synonyms and antonyms.
- obdurate adjective — stubbornly refusing to change one's mind
- obedience noun — the quality of complying with rules, orders, or requests
- obfuscate verb — to render unclear or unintelligible
- objective adjective — based on facts rather than personal feelings
- oblige verb — to do a favor for or accommodate someone; also, to compel or bind by duty
- oblique adjective — indirect or not plainly expressed
- obscure adjective — not well known; hard to understand
- obsequious adjective — too eager to obey or please someone important
- observant adjective — quick to notice details
- observe verb — to watch or notice something carefully
- obsolete adjective — no longer in use or out of date
- obstinate adjective — stubbornly refusing to change one's opinion
- obstreperous adjective — noisy, unruly, and difficult to control
- obtuseness noun — slowness to understand or notice what should be clear
- obviate verb — to prevent or remove the need for something
- occasional adjective — happening sometimes but not often
- occult adjective — hidden from ordinary view or knowledge
- octagon noun — a shape with eight straight sides and eight angles
- octagonal adjective — shaped like an eight-sided figure
- octopus noun — a soft-bodied sea creature with eight arms
- ominous adjective — suggesting something bad will happen
- omnivore noun — an animal that eats both plants and other animals
- ongoing adjective — still happening or continuing
- opaque adjective — not transparent; hard to understand
- opulence noun — great wealth displayed through luxury and splendor
- orderly adjective — neatly and carefully arranged
- ordinary adjective — normal or not special
- organize verb — to arrange things in a clear and useful way
- ornate adjective — elaborately decorated
- orthodox adjective — following established beliefs or accepted practices
- oscillate verb — to waver back and forth between positions, opinions, or states; to swing with a steady rhythm
- ossify verb — to harden or become rigid and resistant to change
- ostensible adjective — appearing or claimed to be true, but not necessarily so
- ostentatious adjective — showy in a vulgar way
- ostracize verb — to exclude someone from a group or society
- outcome noun — the final result of an action or event
- outmoded adjective — no longer useful or fashionable because something newer exists
- overcast adjective — covered with clouds
- overdue adjective — not finished or arrived by the expected time
- overwhelmed adjective — feeling unable to handle everything happening