www.alphadictionary.com

Anointing with oil, especially in rituals or ceremonies, also the application of an ointment or salve.
As in: my chafed tuchus was relieved with the unction of diaper rash unguent.

I've often thought a good name for an oil change station chain might be Unction Junction (keep it function-ing).

We have had unctuous and unguent. Would they count?