Fire up and Speed up

Fire up verb - To rouse to strong feeling or action.

Speed up and fire up are semantically related in hurry topic. In some cases you can use "Speed up" instead a verb "Fire up", when it comes to topics like incite, timing.

Speed up verb - To cause to move or proceed fast or faster.

Fire up and speed up are semantically related in hurry topic. Sometimes you can use "Fire up" instead a verb "Speed up", if it concerns topics such as incite, timing.