Think up and Think out

Think up verb - To create or think of by clever use of the imagination.

Think out and think up are semantically related in invent topic. In some cases you can use "Think out" instead a verb "Think up", when it comes to topics like fabricate, think about seriously.

Think out verb - Consider carefully and rationally.

Think up and think out are semantically related in invent topic. You can use "Think up" instead a verb "Think out", if it concerns topics such as fabricate, think about seriously.