Antonyms of adj nonviable

1 sense of nonviable

Sense 1
nonviable -- (not capable of living or developing successfully)

INDIRECT (VIA dead) -> alive, live -- (possessing life; "the happiest person alive"; "the nerve is alive"; "doctors are working hard to keep him alive"; "burned alive"; "a live canary")

Similarity of adj nonviable

1 sense of nonviable

Sense 1
nonviable -- (not capable of living or developing successfully)
       => dead (vs. alive) -- (no longer having or seeming to have or expecting to have life; "the nerve is dead"; "a dead pallor"; "he was marked as a dead man by the assassin")