old is an antonyn for new, antonym is the opposite meaning of the word: big-small, hot-cold, dark-light, good-bad…
There is no antonym. The use of the word in the sense of genocide is relatively new, anyway.
New experiences
new or modern
The antonym of legacy is contemporary or current, referring to something that is new, modern, or in the present time.
A novice is new or inexperienced.
new, modern, young
new
Conventional, New, Modern, Future, Present, etc...
The antonym of the word 'synonym' is 'antonym'.
A jalopy is a broken-down vehicle, a clunker. So an antonym would be a new car, smooth (or sweet) ride, baby, or toy.
An antonym means "opposite". So an antonym for the word synonym is antonym.
Depending on the application; novel, new, innovative, unique, singular