Transact vs Execute - What's the difference?

Transact is a related term of execute.

is that transact is to do, carry through, conduct or perform some action while execute is .

To do, carry through, conduct or perform some action.

To carry over, hand over or transfer something.

To conduct business.

To exchange or trade, as of ideas, money, goods, etc.

(execut)

To kill as punishment for capital crimes.

There are certain states where it is lawful to execute prisoners convicted of certain crimes.

To carry out; to put into effect.

Your orders have been executed , sir!

I'll execute your orders as soon as this meeting is adjourned.

* Milton

Why delays / His hand to execute what his decree / Fixed on this day?

To perform.

to execute a difficult piece of music brilliantly

to execute a turn in ballet

To cause to become legally valid; as, to execute a contract.

(computing) To start, launch or run; as, to execute a program.

* (computing) start, launch, run, open