instigate
"Starting" "Stirring" "Stomping"
a action verb starting with the letter Y could be yell.
zip, zippy,
zoomed zipped
run, riot, rock, reel...
kick....hope this answers your question.....^_^
macerate
Here's one 9-letter verb with U as the second letter: Duplicate There may be more, but that's a start...
identify inform instruct invent install
attack, appeal, attract, assume, act, arrange, ache, arching, assure, adore,
Vain, vase, veal, verb, veto, view, visa, void and vote are 4 letter words. They begin with the letter V.