Origin, source, inception, root, provenance, provenience, prime mover denote the point at which something (as a process, a growth, a development, a custom, a habit, or an institution) begins its course or its existence.
Category: Synonyms
Orderly vs Methodical vs Systematic vs Regular
Orderly, methodical, systematic, regular are comparable when they mean following closely a set arrangement, design, or pattern.
Order vs Arrange vs Marshal vs Organize vs Systematize vs Methodize
Order, arrange, marshal, organize, systematize, methodize are comparable when they mean to put (a number of persons or things) in proper place especially relatively or to bring about an orderly disposition of individuals, units, or elements that comprise (a thing).
Oral vs Verbal
Oral, verbal are often confused in use.
Opposite vs Contradictory vs Contrary vs Antithetical vs Antipodal vs Antipodean vs Antonymous
Opposite, contradictory, contrary, antithetical, antipodal, antipodean, antonymous are comparable chiefly as applied to abstractions and as meaning so far apart as to be or to seem irreconcilable with each other.
Opportunity vs Occasion vs Chance vs Break vs Time
Opportunity, occasion, chance, break, time are comparable when they mean a state of affairs or a combination of circumstances favorable to some end.
Opponent vs Antagonist vs Adversary
Opponent, antagonist, adversary all denote one who expresses or manifests opposition.
Opinion vs View vs Belief vs Conviction vs Persuasion vs Sentiment
Opinion, view, belief, conviction, persuasion, sentiment are comparable when they mean a more or less clearly formulated idea or judgment which one holds as true or valid.
Onward vs Forward vs Forth
Onward, forward, forth are comparable when they mean in the act of advancing or getting ahead (as in a movement, progression, series, or sequence).
Only vs Alone
Only, alone are often used interchangeably (though alone is not found in the attributive position), but seldom without a slight change in meaning or emphasis.
Onerous vs Burdensome vs Oppressive vs Exacting
Onerous, burdensome, oppressive, exacting are comparable when they mean imposing severe trouble, labor, or hardships.
Omnipresent vs Ubiquitous
Omnipresent, ubiquitous mean present or existent everywhere.