Downcast vs Disheartening - What's the difference?

As adjectives the difference between downcast and disheartening

is that downcast is (of eyes) looking downwards while disheartening is causing to lose heart; making despondent or gloomy; scare; discourage.

is that downcast is (obsolete) to cast or throw up; to turn upward while disheartening is .

is (computing) a cast from supertype to subtype.

(en adjective)

(of eyes) Looking downwards.

* Dryden

'Tis love, said she; and then my downcast eyes, / And guilty dumbness, witnessed my surprise.

(of a person) Feeling despondent.

(en noun)

(computing) A cast from supertype to subtype.

(obsolete) A melancholy look.

* Beaumont and Fletcher

That downcast of thine eye.

(mining) A ventilating shaft down which the air passes in circulating through a mine.

(obsolete) To cast or throw up; to turn upward.

(Scotland) To taunt; to reproach; to upbraid.

(computing) To cast from supertype to subtype.

(en adjective)

Causing to lose heart; making despondent or gloomy; scare; discourage.

* See also

(head)