Here is a list of verbs that start with STA.
stabbed, stabilize, stabilized, stabilizes, stabilizing
stabled, stacked, stacking, staff, staffed
staffing, stage, staged, stagger, staggered
staggering, staging, staid, stain, stained
staining, stains, stake, staked, stakes
stalked, stalking, stalled, stalling, stammered
stammering, stamp, stamped, stampede, stampeded
stamping, stand, standardized, standardizing, standeth
standing, stands, starched, stare, stared
staring, starred, starring, start, started
starting, startle, startled, starts, starve
starved, starving, stashed, state, stated
states, stating, stationed, stave, staved
stay, stayed, staying, stays
Hope you enjoy this page of verbs that start with sta and the rest of this verb list site as well.
Did I miss any verbs? Visitors can make this a more useful online resource by listing more verbs in the comments.