Well, there is the Semantics of "defining definitions", but it's necessary because words mean things, and with good reason.
But, it may not be that there is a confusion here or a difference, as I think about this and as I read the other replies. Maybe just the two sides of the same coin somehow detached.
Coins have two sides, the OUTside and the INside. Or, its surface and its core. I've noticed that words tend to be that way also, depending on how you apply the statement. For instance...
"Nothing is an illusion."
"Nothing.....is an illusion."
See the difference? The exact same words, exact same sentence, but different perspectives, thus meanings, thus applications.
Love as both emotion AND action and its characteristics and provocation of feeling being definitions may be similar, if not exact.
Love (noun - feeling/emotion) as the INside core and love (verb - action) as the OUTside surface.
What do you think? (Did I just confuse? Lol!!!)