The noun "part" (meaning a piece, or section) has the antonyms whole or entirety. When used with a modifying phrase (of), the opposite of part is all.
The antonym of all is "none".
part
The antonym for the verb pre-position would be post-position. The part of speech "preposition" does not have an antonym.
There is no antonym to fetlock. A fetlock is part of a horses mane.
I really can't answer the antonym part, but I can say that a synonym could be waterfowl or waterbird.
Since the skyline is considered the uppermost part of the sky, the antonym would be baseline, the lowest most point.
A synonym is a word that means the same. An antonym is a word that means the opposite. A projection is a part that sticks out. A recess is a part that goes inward. These two words are opposites.
"Unpatriotic" and its antonym, "patriotic", are both adjectives.
The opposite (antonym) would be basement or cellar,or pretty much anything below ground since an attic is at the top part of a house.
The antonym of the word 'synonym' is 'antonym'.
There are a few different meanings to fault. The antonym of fault as a verb, meaning blame or criticize, is praise. The antonym of fault as a noun, as in a bad part of an argument, is asset. The antonym of fault, meaning imperfection, is perfection or beauty. The antonym of fault as a noun, as in mistake, or "my fault", is good or accuracy.
An antonym means "opposite". So an antonym for the word synonym is antonym.