Afterthought vs Reconsider - What's the difference?

As verbs the difference between afterthought and reconsider

is that afterthought is to expound as an afterthought while reconsider is to consider a matter thought already to have been decided.

is a reflection after an act; a later or subsequent thought, action, or expedient.

(en noun)

A reflection after an act; a later or subsequent thought, action, or expedient.

She packed her sandals only as an afterthought , but she was glad she did.

Something additional to the original plan or concept.

This whole remodeling was an afterthought , we were only going to paint and call it good.

(en verb)

To expound as an afterthought.

(en verb) (wikipedia reconsider)

To consider a matter thought already to have been decided.

Is there any way I can get you to reconsider selling your car?

In parliamentary procedure, a motion to bring back for further debate and a revote a motion that has already been passed.