Just as Margolus and Toffoli coined the term computronium for a substance that can perform arbitrary computations, I like to use the term sentronium for the most general substance that has subjective experience (is sentient).*5
I think conflating sentience with consciousness is maybe not quite right. I am not sure what I don’t like about it but it has something to do with consciousness being having a subjective experience and sentience being feeling — feels very much like a subset of consciousness.