Pumped up and Start up

Pumped up adjective - Tense with excitement and enthusiasm as from a rush of adrenaline.

Start up and pumped up are semantically related. in activate topic. In some cases you can use "Start up" instead a verb "Pumped up", when it comes to topics like energize.

Start up verb - Get going or set in motion.

Pumped up and start up are semantically related. Sometimes you can replace term "Pumped up" with "Start up", this phrasal verbs are similar.