Thanks for answering my previous question (Can a third-party plugin for Reaction Commerce use a non-GPL commercial license?).
The new question is something related: can a third-party provider of Reaction Commerce related services / plugins use the «reaction» word in its domain name?
I have learnt your «Copyright» page:
Reaction Commerce is a mark of Reaction Commerce, Inc. “Reaction Commerce” and the Reaction Commerce graphic logo are all trademarks of Reaction Commerce, Inc.
Currently it says only about the «Reaction Commerce» phrase, not about «Reaction».
But probably you can register the «Reaction» word as trademark too in future.
So, that is your position about using the «reaction» word in a domain name: e.g.:
reaction-<other word>.<TLD>. Is it OK or not?