• to spring to the attack
• buoyancy, dash, ginger, go, impetus, lilt, momentum, movement, pathos, pep, run, swing, verve, zest, zip, élan
• animated, breezy, buoyant, dashing, full of zip, have plenty of go, snappy, to be full of go, zippy
• to feel one's legs, to find one's legs, to get going, to get into one's strides, to get off the ground, to get under way, to hit one's strides