aggressiveness, animal spirits, animation, assibilate, assibilation, ball the jack, bang, barrel, bite, boom, bowl along, breeze, breeze along, briskness, brush, bustle, buzz, capersomeness, clip, coltishness, cut along, dash, drive, effervesce, effervescence, effervescing, elan, enterprise, esprit, exuberance, fire, fizz, fizzle, fizzling, fleet, flit, fly, fly low, foot, frication, frictional rustling, friskiness, frolicsomeness, gaiety, gamesomeness, gayness, get-up-and-go, ginger, go fast, gusto, guts, hasten, heartiness, highball, hiss, hissing, hotness, hush, hushing, hustle, initiative, kick, life, lisp, liveliness, make knots, nip, nippiness, outstrip the wind, pep, pepper, pepperiness, piss and vinegar, pizzazz, playfulness, poop, pour it on, punch, push, raciness, relish, rhonchus, rip, rollicksomeness, rompishness, rush, scorch, shush, shushing, sibilance, sibilate, sibilation, siffle, sigmatism, siss, sissing, sizz, sizzle, sizzling, skim, skittishness, snap, snappiness, sneeze, sneezing, sniff, sniffle, snore, snort, snuff, snuffle, speed, spice, spiciness, spirit, spiritedness, spirits, spit, splutter, sportiveness, sprightliness, spunk, sputter, squash, squelch, squish, starch, sternutation, stertor, storm along, sweep, swish, tang, tear along, thrust, thunder along, verve, vigor, vim, vitality, vivacity, waltz, wheeze, whish, whisk, whistle, whistling, white noise, whiz, whoosh, zest, zestfulness, zing, zoom
zero, nothing, null, nul, naught, nought, void, cipher, goose egg, none, nobody, no one, nichts, nixie, nix, zilch, zip
, zippo, not a soul, ame qui vive, absence, unsubstantiality, not one, not a one, not any, nary a one, not a, never a, not a whit of, not an iota of, not a drop of, not a speck of, not a jot, not a trace of, not a hint of, not a smidgen of, not a suspicion of, not a shadow of, neither hide nor hair of.
sibilance, sibilation, zip
, hiss, sternutation, high note, goose, serpent, snake (animal sounds), insect, bug, bee, mosquito, wasp, fly, tea kettle, pressure cooker, air valve, pressure release valve, safety valve, tires, air escaping from tires, punctured tire, escaping steam, steam, steam radiator, steam release valve, sibilant, hissing, wheezy, sternutative.