Step on gas and Speed up

Speed up and step on gas are semantically related in hurry topic. In some cases you can use "Speed up" instead a verb phrase "Step on gas", when it comes to topics like act, timing.

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

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