The synonyms for "love" include: "affection", "passion", "yearning" and so on. In relation to its synonyms what would the word "love" be referred to as?
The synonyms of "love" are affection, passion and yearning.
Now the incomplete sentence:
The word "Love" is the [insert word here] of affection, passion and yearning.
I am trying to think of a word that would help me establish a reverse relation. However all I could come up with are words and phrases like "Source", "Target of synonyms" and so on.