The difference between Enlarge and Expatiate

Enlarge as a verb (transitive):

To make larger.

Enlarge as a verb (intransitive):

To grow larger.

Enlarge as a verb (transitive):

To increase the capacity of; to expand; to give free scope or greater scope to; also, to dilate, as with joy, affection, etc.

Enlarge as a verb (intransitive):

To speak or write at length upon or on (some subject)

Enlarge as a verb (archaic):

To release; to set at large.

Enlarge as a verb (nautical):

To get more astern or parallel with the vessel's course; to draw aft; said of the wind.

Enlarge as a verb (legal):

To extend the time allowed for compliance with (an order or rule).

Expatiate as a verb (now, rare):

To range at large, or without restraint.

Expatiate as a verb:

To write or speak at length; to be copious in argument or discussion.

Expatiate as a verb (obsolete):

To expand; to spread; to extend; to diffuse; to broaden.