Assent vs Ratify - What's the difference?

As verbs the difference between assent and ratify

is that assent is to agree to, give approval while ratify is to give formal consent to; make officially valid.

is agreement, act of agreeing.

(en verb)

To agree to, give approval.

* Macaulay

The princess assented to all that was suggested.

To admit a thing as true.

* Bible, Acts xxiv. 9

And the Jews also assented , saying that these things were so.

* accede *

(en noun)

agreement, act of agreeing

I will give this act my assent .

* ----

(en-verb)

To give formal consent to; make officially valid.

* (give formal consent to): approve