Difference between Brightens and Lighten

BRIGHTENS vs LIGHTEN: VERB

To descend; to light.
To burst forth or dart, as lightning; to shine with, or like, lightning; to display a flash or flashes of lightning; to flash.
To grow lighter; to become less dark or lowering; to brighten; to clear, as the sky.

To free from trouble and fill with joy.
To emit or disclose in, or as in, lightning; to flash out, like lightning.
To illuminate with knowledge; to enlighten.
To make light or clear; to light; to illuminate
To make lighter, or less heavy; to reduce in weight; to relieve of part of a load or burden
To make less burdensome or afflictive; to alleviate.
To cheer; to exhilarate.

Make lighter
Reduce the weight on
Make more cheerful through the use of color
To descend; settle down; light.
To become light or lighter; grow light or clear up; brighten: as, the sky lightens.
To emit flashes of lightning; shoot out as lightning; flash. See lightning. The lightning that lighteneth out of the one part under heaven shineth unto the other part.
To make light or bright; give light to; light up.
To illuminate mentally or spiritually; enlighten.
To send forth like lightning.
To become light or less heavy.
To make light or less heavy; reduce in weight; relieve of weight: as, to lighten coin by clipping or abrasion; to lighten a load or a ship.
To make less burdensome or oppressive; alleviate: as, to lighten the cares of life.
To cheer; gladden.
To make lighter in color or shade: as, to lighten the background of a picture.

Sparkles, Glows, Softens, Warms, Freshens, Shines, Enlivens, Dims, Lightens, Darkens, Clear, Clear up, Lighten up, Light up, Lighten

Enlighten, Minimize, Ameliorate, Simplify, Relax, Alleviate, Ease, Reduce, Relieve, Soften, Lessen, Loosen, Buoy up, Lighten up, Brighten

Awakens, Dapples, Conjures, Lengthens, Slows, Twinkles, Glistens, Perked, Enlarges, Enriches, Fades, Rejuvenates, Sparkles, Clear, Light up

Streamline, Diminish, Enlighten, Minimize, Ameliorate, Simplify, Relax, Ease, Reduce, Relieve, Soften, Lessen, Loosen, Buoy up, Brighten

Sons are stars that brightens up the world.
Licorice extract reduces dark spots and brightens skin.
You are the sun that brightens my sky.
This hero serum visibly brightens, tightens and lifts.
What act or experience always brightens her day?
Christmas decoration brightens the house with holiday cheer.
11th June 2012 - Verali brightens up your wardrobe.
The thought of you brightens up my day.
The sun brightens the day, and the moon brightens the night, but you brighten my life.
The pink jelly base brightens, while the watermelon extract hydrates and brightens your skin.

Christmas cheer that helped lighten up the screen.
Do this daily till the dark circles lighten.
How about a poem to lighten things up?
Can You Lighten Up Corned Beef and Cabbage?
Lighten the mood with a funny Christmas card.
Lighten up and learn to compromise on occasion.
Acetone will cause the colours to lighten considerably.
Take a look and feel your shoulders lighten.
Messiah will lighten the righteous when he comes.
But things lighten up, as much as they can ever lighten up in the ACC, over the next three weeks.