consubstantiation
Concise Oxford English Dictionary © 2008 Oxford University Press:
consubstantiation /ˌkɒnsəbstanʃɪˈeɪʃ(ə)n, -sɪ-/
▶noun Christian Theology the doctrine that the substance of the bread and wine coexists with the body and blood of Christ in the Eucharist. Compare with transubstantiation.
'consubstantiation' also found in these Oxford entries:

