Currently kubeclient @entities hash is keyed by singular name, so if collision is on singular name, as for processedtemplates/templates:
# template.openshift.io/v1 openshift-origin-v3.6.0/apis/template.openshift.io/v1/index.json
template processedtemplates
template templates COLLISION
the last one wins — the earlier processedtemplates methods are not defined at all, only the latter template and templates methods!