A telecommunications facilitator whose job is to establish temporary network connections, an agent that operates some apparatus or machine, A military person who executes a special operation

Plural form of operator

a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or proof, the legal document stating the reasons for a judicial decision, A belief that a person has formed about a topic or issue, transitive verb_ obsolete To opine, archaic To have or express as an opinion

Plural form of opinion

One who opposes in a disputation, argument, or other verbal controversy; specifically, one who attacks some thesis or proposition, in distinction from the respondent, or defendant, who maintains it, One that opposes another or others, as in a battle, contest, or debate, One who is hostile to an idea or cause, adjective_ Acting against an antagonist or opposing force, Situated in front; opposite; hence, opposing; adverse; antagonistic, characterized by active hostility

Plural form of opponent

Plural form of opportunity

A favorable or advantageous circumstance or combination of circumstances, A chance for progress or advancement, as in a career, Fit, convenient, or seasonable time; favorable chance or occasion; favorable or favoring conjuncture of circumstances_ as, to avail one's self of the opportunity to do something; to seize the opportunity

characterized by active opposition, acting in opposition to, Acting in opposition; opposing, verb_ simple past tense and past participle of oppose

Placed or located directly across from something else or from each other, Facing the other way; moving or tending away from each other, Being the other of two complementary or mutually exclusive things, Altogether different, as in nature, quality, or significance, noun_ An opponent or antagonist, An antonym