Later.
The sooner the South Vietnamese were able to defend themselves against their northern relatives, the sooner the US could leave.
Brent Rawls
This word does not have an opposite.
The opposite relationship of uncle would be Niece or Nephew.(The opposite gender is aunt.)
Predator is opposite for hunter.
sooner
Normally the opposite is early.(where late is used to mean deceased, the opposite is alive)
"prompt" is one possibility
This is not always the case, in fact, the opposite is usually true.
The Sooner State.
No, sooner is an adverb. But there is a proper noun Sooner, a nickname applied to pioneers in the Oklahoma Territory.
No sooner met but they looked, No sooner looked but they loved, No sooner loved but they sighed, No sooner sighed but they asked one another the reason, No sooner the reason but they sought the remedy, And in these degrees they made a pair of stairs to marriage. Shakespeare, As you Like it
I'd rather arrive sooner than later. Their boat is scheduled to arrive sooner than ours. I'd like to take the same schooner as Mrs. Spooner because it will arrive sooner.
sooner state
The Sooner State
The Sooner It Comes was created in 2004-01.
A "sooner dog" can look like most any dog. Sooner isn't a breed of dog, it's more like it's a descriptive word for an attitude. I believe that "sooner" is a name for a dog that would "sooner" do this or that as to do that or this. In other words it's the sort of dog that would sooner urinate on the carpet than urinate on a tree. You can substitute the italics with most any things he would "sooner" do.