What two greek words meaning homeostasis?

There isn't a single, universally accepted pair of Greek words that directly translates to "homeostasis" as the term was coined relatively recently. However, we can construct a suitable phrase from Greek roots that captures its meaning:

* ὁμοῖος (homoios): similar, like, equal

* στάσις (stasis): a standing, a state of being, equilibrium

Combining these, you could represent homeostasis as something like ὁμοιοστάσις (homoiostasis). This isn't a classical Greek term, but it accurately reflects the concept of "similar standing" or "stable sameness."