Definition
Ecumenicalism is also not a widely recognized or standard term. Like 'ecumenicism,' it seems to be a variant of 'ecumenism,' which signifies the promotion of unity and cooperation among different Christian denominations. If this form were valid, it would have a similar meaning, perhaps emphasizing the ideology or principles underlying ecumenical efforts. It is better to use the simpler and well-established word, 'ecumenism'. Think of it as a longer version of something we already have. 😉