Love. when considered as a noun, we're offered adoration, worship, affection, attachment, devotion, fondness, liking and loyalty as synonyms, but none of these really mean the same thing.
But you don't want them to mean the same thing, since you are looking for differentiation. I think the use of "love" for all these different attitudes/afflictions is a secondary phenomenon: either you don't want to differentiate them out of sheer laziness, or "love" is (improperly) used as a "generic superlative" for all these terms, to which I am inclined to ad: interest, predilection, preference, inclination, hankering, passion, attraction, crush, obsession, infatuation, enthusiasm..