dysergy

The opposite of synergy - The idea that combined parts have properties that are more or less that the sum of the parts. The negative-sum version is sometimes called dysergy, leaving synergy to mean only beneficial effects.

note. i am not entirely sure if the usage in the example provided is right, as it is a very uncommon word, but submissions require an example so i'll give it a whirl.

the heros fought against each other in dysergy.

dysergy by vodka June 2, 2004

Dynergy

The opposite of synergy. The concept that two people working together accomplish less than one of the individuals working on his/her own.

Moving furniture with a woman.

Woman: Would you like me to help you carry that couch up the stairs?

Man: Hell no, we would just experience dynergy. It would be much easier for me to just carry it on my own.

Dynergy by Jerome Haywood June 18, 2011