[dekhn]

No. https://en.wikipedia.org/wiki/Epiphenomenalism

[whatshisface]

Note that that title ends in "ism," like "Calvinism," or "Evangelicalism."

[posterboy]

hence epiphenomenal-ize? I don't thinkso.

Maybe it's more like epiphenomalis-m(a), where -is could be a genetive ending. I.e. the idea of epiphenomena.