I can confirm both “each” and “kiss” will work for the 各 radical. Likewise, “kiss” will give you a grey shake for the 各 kanji quiz. This is one of the features introduced with the grey shake update.
@simias, I appreciate the examples and context you provided here. I’ll let our content team know about this thread. You’re welcome to continue adding further examples to this thread, but generally the best way of getting feedback/requests to us is emailing hello@wanikani.com. That way, we can ensure nothing slips through the cracks.