Facing, or across from.
In a complementary role to.
On another channel at the same time.
Something opposite or contrary to something else.
An opponent.
A person or thing that is entirely different from or the reverse of someone or something else; used to show contrast between two people or two things.
An antonym.
An additive inverse.
Facing in the other direction.
Of leaves and flowers, positioned directly across from each other on a stem.
Located directly across from something else, or from each other.
Of either of two complementary or mutually exclusive things.
Extremely different; inconsistent; contrary; repugnant; antagonistic.
In an opposite position.
An alternative (often shorter) name defined for an object in a database.
Any name for a taxon, usually a validly published, formally accepted one, but often also an unpublished name.
A word whose meaning is the same as that of another word.
A word or phrase with a meaning that is the same as, or very similar to, another word or phrase.
Any of the formal names for a taxon, including the valid name (i.e. the senior synonym).