Antonyms for co-existing

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR CO-EXISTING

Now, however, they must be regarded as co-existing phenomena.

But co-existing with such spiritual bankruptcy as was also unexampled, one would hope.

It is only by breeding the two insects that it can be determined whether this is a case of a co-existing variety or of dimorphism.

Explanation must always consist in discovering an immediate connection between some fact and some co-existing or preceding fact.

The idea of a substance is a complex of various simple ideas united in one subject and co-existing together.

Either feature alone would be easily accounted for; but the two co-existing in the same document are more baffling.

What else are these than persistent contractions or tonic tics, alternating or co-existing with jerking movements or clonic tics?