I posted about this in the comments for the Surgebinding Shardcast episode, but I wanted to elaborate on it more.
So, Adhesion, according to the Ars Arcanum, is the surge of pressure and vacuum. While it is more broadly the surge of connection, this is at least its physical embodiment.
Now, we have Odium being described by Syl:
Odium is described as a Void, a vacuum, drawing in emotion. Through pressure. It seems like this description of Odium is very reminiscent of Adhesion, supposedly Honor’s truest surge.
We know all the other nine surges are a combination of two shards. Honor and Cultivation. What if Adhesion is also a combination of two shards. But not Honor and Cultivation. Honor and Odium.
Additionally, this effect is reflected in Raysium. According to Navani talking about Raysium in fused weapon stealing Stormlight:
Again, a pressure differential being a key factor in Odium magics. Raysium is an investiture pressure vacuum.
Anyway, this could be pure coincidence, but it does open up some interesting questions, particularly about Voidbinding. Specifically because some of the abilities of Voidbinders seem linked to Connection, an ability of Adhesion.