Abruptness, Abstruse, Arduous, Ascendant, Ascending, Ascension, Ascent, Aslant, Brutal, Burdensome, Clamber, Climb, Climbing, Complex, Critical, Crushing, Delicate, Demanding, Difficult, Downgrade, Downhill, Elevation, Escalade, Exacting, Forced, Formidable, Fountain, Grueling, Gush, Hairy, Hard, Heavenward, Heavy, Hefty, Increase, Intricate, Jet, Jump, Killing, Knotted, Knotty, Laborious, Leap, Leaping, Levitation, Mean, Mount, Mounting, Onerous, Oppressive, Painful, Punishing, Rampant, Rearing, Rigorous, Rise, Rising, Rough, Rugged, Severe, Skyward, Slantwise, Soaring, Spiny, Spout, Spring, Springing, Spurt, Steep, Steepness, Strained, Strenuous, Surge, Thorny, Ticklish, Tough, Tricky, Troublesome, Up, Upcoming, Upgrade, Uplift, Uprise, Uprising, Upstairs, Upstream, Upsurge, Upswing, Uptown, Upward, Upwards, Vault, Wearisome, Wicked, Zooming