Intercede vs Supplicate - What's the difference?

As verbs the difference between intercede and supplicate

is that intercede is while supplicate is to humble oneself before (another) in making a request; to beg or beseech.

(interced)

To plead on someone else's behalf.

To act as a mediator in a dispute; to arbitrate or mediate.

* Milton

I to the lords will intercede , not doubting their favourable ear.

To pass between; to intervene.

* Sir M. Hale

He supposed that a vast period interceded between that origination and the age wherein he lived.

----

(en-verb)

To humble oneself before (another) in making a request; to beg or beseech.

To entreat for; to ask for earnestly and humbly.

to supplicate blessings on Christian efforts to spread the gospel

To address in prayer; to entreat as a supplicant.

to supplicate the Deity

(Oxford University) To request that an academic degree is awarded at a ceremony.