Here's one 9-letter verb with U as the second letter:
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There may be more, but that's a start...
Some verbs starting with the letter a:ableabandonabductaccountaccuseaceactaddaddressadmireadoreafflictageaggravateaimalertanimateapproachapprovearearriveaskassistassociateassortattachattendavengeavoidawakenax
Some verbs that begin with the letter i:identifyillustrateimplementimproveimproviseinduceinfiltrateinfluenceinforminitiateinjectinjureinlayinnovateinsinuateinspectinspireinstallinstigateinstituteinstructintegrateinterfereinterrogateinterpretinterruptinterviewintroduceinventinventoryinvestigateinviteirritateitch
Some verbs that begin with the letter J are:jabjabberjackjeerjeopardizejestjerkjoinjokejourneyjoustjudgeJumpjunk
Some verbs beginning with J:jabjabberjackjailjamjanglejarjawjaywalkjeerjeopardizejerkjestjetjigglejiltjimmyjinglejitterjivejogjoinjokejoltjostlejotjoustjudgejugglejumpjunkjunkjustifyjutjuxtapose
Some verbs beginning with W:WaddleWadeWakeWalkWatchWeaveWelcomeWhimperWhisperWieldWiggleWinkWinWonderedWonWounded
Some verbs that start with the letter P are:pounceprotectprepareplypretendprick
Some past tense verbs beginning with the letter 'E' are:EarnedElaboratedElectedEvaluatedEmbracedEmbarrassedEncouragedEndedEnjoyedEntertainedEducatedEscortedEnviedEstimatedExceededExercisedExcludedExchangedExcitedExhaledExpandedExtended
Vote is an action verb. Vaccinate and vandalize are action verbs.
Some verbs beginning with the letter 'D' are:DyeDieDrillDoDarkenDisclaimDroolDroneDrumDrainDarn (Like darning a sock or a piece of clothing)DimDanceDashDecideDigDineDipDisagreeDishDiveDivideDoubleDozeDragDrawDreamDressDriftDrinkDriveDropDrownDryDuckDumpDwellDecorateDamageDecayDefineDelayDelegateDeliverDetermineDevelopDoubtDust
Some examples of five-letter verbs that contain "or" are: Honor Chord Forgo Dorms
Some verbs beginning with F:facedfacilitatefacilitatedfadefailfaintfakefall, fellfalsifyfanfascinatefastenfaultedfaxfearfeaturedfeedfeelfeltfendfetchfibbedfiddlefightfilefillfilmfinalizefinancefindfirefiredfitfixfixedfleeflingfloatfloodflopflowfly, flew, flownfoldfollowfoolforbidforceforecastforegoforeseeforetellforgetforgiveformformulateforsakefortifyfoughtfoundedframeframedfreefreezefrightenfrownfryfullfundedfinish finish fartflyfencingfleeflattenfatten
negotiating