shono98:
I agree with how you use the words. I think "spanks" and "swats" are interchangeable
That's interesting, Shono. While I also agree with both you and Graves that the plural of spanking (i.e. spankings) refers to more than one (complete) spanking, I don't find "swats" and "spanks" interchangeable. I usually associate "swats" with an instrument like a paddle or hairbrush. Whereas "spanks", to me anyhow, typically referrers to open hand.
The closest synonyms to "spanks" in my mind would be "smacks" and or possibly "slaps".
I have further used all three of the above to signify the sound occuring immediately after the landing of blow especially on a bare behind. Something like... ***SMACK*** ***SLAP***
ALL three to a certain extent exhibit the property of onomatopoeia.