As adjectives the difference between opposite and parallel
is that
opposite is located directly across from something else, or from each other while
parallel is equally distant from one another at all points.
As nouns the difference between opposite and parallel
is that
opposite is something opposite or contrary to another while
parallel is one of a set of parallel lines.
As adverbs the difference between opposite and parallel
is that
opposite is in an opposite position while
parallel is with a parallel relationship.
As a preposition opposite
is facing, or across from.
As a verb parallel is
to construct or place something parallel to something else.