Withhold vs Retention - What's the difference?

As a verb withhold

is to keep (a physical object that one has obtained) to oneself rather than giving it back to its owner.

retention.

To keep (a physical object that one has obtained) to oneself rather than giving it back to its owner.

To keep (information, etc) to oneself rather than revealing it.

To retain; to keep back; not to grant; as, to withhold assent to a proposition.

* retain

* overwithhold * underwithhold

(wikipedia retention)

(en noun)

The act of retaining or something retained

* 1599 , , II. iv. 95:

No woman's heart / So big, to hold so much; they lack retention .

The act or power of remembering things

A memory; what is retained in the mind

(medicine) The involuntary withholding of urine and faeces

(obsolete) That which contains something, as a tablet; a means of preserving impressions.

(Shakespeare)

(obsolete) The act of withholding; restraint; reserve.

* 1599 , , V. i. 79:

His life I gave him, and did thereto add / My love without retention or restraint,

(obsolete) A place of custody or confinement.

(legal) The right to withhold a debt, or of retaining property until a debt due to the person claiming the right is duly paid; a lien.

(Erskine)

(Craig)