diff --git a/dictionaries/html/html.txt b/dictionaries/html/html.txt
index 8298f02dbd1..9882febcc50 100644
--- a/dictionaries/html/html.txt
+++ b/dictionaries/html/html.txt
@@ -1773,19 +1773,82 @@ Omicron
omid
ominus
onabort
+onactivate
+onaddstream
+onaddtrack
+onafterprint
+onafterscriptexecute
+onanimationcancel
+onanimationend
+onanimationiteration
+onanimationstart
+onappinstalled
+onaudioend
+onaudioprocess
+onaudiostart
onautocomplete
onautocompleteerror
+onauxclick
+onavailabilitychanged
+onbackgroundfetchabort
+onbackgroundfetchclick
+onbackgroundfetchfail
+onbackgroundfetchsuccess
+onbeforeevicted
+onbeforeinput
+onbeforeinstallprompt
+onbeforeload
+onbeforeprint
+onbeforescriptexecute
+onbeforeunload
+onbeforexrselect
+onbegin
+onblocked
onblur
+onbounce
+onboundary
+onbufferedamountlow
oncancel
oncanplay
oncanplaythrough
onchange
+oncharacteristicvaluechanged
+onchargingchange
+onchargingtimechange
onclick
onclose
+onclosed
+onclosing
+oncommand
+oncompositionend
+oncompositionstart
+oncompositionupdate
+onconnect
+onconnecting
+onconnectionavailable
+onconnectionstatechange
+oncontentdelete
oncontextmenu
+oncontrollerchange
+oncookiechange
+oncopy
oncuechange
+oncut
+ondata
+ondataavailable
+ondatachannel
ondblclick
+ondevicechange
+ondevicelight
+ondevicemotion
+ondeviceorientation
+ondeviceorientationabsolute
+ondeviceproximity
+ondiscconnect
+ondischargingtimechange
+ondisconnect
ondrag
+ondragdrop
ondragend
ondragenter
ondragexit
@@ -1795,18 +1858,62 @@ ondragstart
ondrop
ondurationchange
onemptied
+onencrypted
+onend
onended
+onenter
+onenterpictureinpicture
onerror
+onevent
+oneventname
+onevicted
+onexit
+onfetch
+onfinish
onfocus
+onfocuschange
+onfocusin
+onfocusout
+onformdata
+onfullscreenchange
+onfullscreenerror
+ongamepadconnected
+ongamepaddisconnected
+ongatheringstatechange
+ongeometrychange
+ongesturechange
+ongestureend
+ongotpointercapture
+onhashchange
+onicecandidate
+onicecandidateerror
+oniceconnectionstatechange
+onicegatheringstatechange
oninput
+oninputreport
+oninputsourcescchange
+oninputsourceschange
+oninstall
oninvalid
onkeydown
onkeypress
+onkeystatuseschange
onkeyup
+onlanguagechange
+onleavepictureinpicture
+onlevelchange
+onlinebanking
onload
onloadeddata
onloadedmetadata
+onloading
+onloadingdone
+onloadingerror
onloadstart
+onlostpointercapture
+onmark
+onmerchantvalidation
+onmidimessage
onmousedown
onmouseenter
onmouseleave
@@ -1815,26 +1922,143 @@ onmouseout
onmouseover
onmouseup
onmousewheel
+onmozorientationchange
+onmozpointerlockchange
+onmscandidatewindowhide
+onmscandidatewindowshow
+onmscandidatewindowupdate
+onmssitemodejumplistitemremoved
+onmsthumbnailclick
+onmute
+onnegotiationneeded
+onnomatch
+onnotificationclick
+onnotificationclose
+onoffline
+ononline
+onorientationchange
+onoverconstrained
+onpagehide
+onpageshow
+onpaste
onpause
+onpayerdetailchange
+onpaymentmethodchange
+onperiodicsync
onplay
onplaying
+onpointercancel
+onpointerdown
+onpointerenter
+onpointerleave
+onpointerlockchange
+onpointerlockerror
+onpointermove
+onpointerout
+onpointerover
+onpointerup
+onpopstate
+onprioritychange
+onprocessorerror
onprogress
+onpush
+onpushsubscriptionchange
onratechange
+onreading
+onreadingerror
+onredo
+onredraw
+onreflectionchange
+onrejectionhandled
+onreloadpage
+onremove
+onremovestream
+onremovetrack
+onrepeat
onreset
onresize
+onresourcetimingbufferfull
+onresult
+onresume
onscroll
+onsearch
+onsecuritypolicyviolation
onseeked
onseeking
onselect
+onselectedcandidatepairchange
+onselectend
+onselectionchange
+onselectstart
+onshippingaddresschange
+onshippingoptionchange
onshow
+onsignalingstatechange
+onslotchange
onsort
+onsoundend
+onsoundstart
+onspeechend
+onspeechstart
+onsqueeze
+onsqueezeend
+onsqueezestart
onstalled
+onstart
+onstatechange
+onstop
+onstorage
onsubmit
onsuspend
+onsync
+onterminate
+onterminated
ontimeupdate
ontoggle
+ontonechange
+ontouch
+ontouchcancel
+ontouchend
+ontouchmove
+ontouchstart
+ontrack
+ontransitioncancel
+ontransitionend
+ontransitionrun
+ontransitionstart
+onundo
+onunhandledrejection
+onunload
+onunmute
+onupdatefound
+onupgradeneeded
+onuploadprogress
+onuploadrequest
+onuserproximity
+onvisibilitychange
+onvoiceschanged
onvolumechange
+onvrdisplayactivate
+onvrdisplayblur
+onvrdisplayconnect
+onvrdisplaydeactivate
+onvrdisplaydisconnect
+onvrdisplayfocus
+onvrdisplaypointerrestricted
+onvrdisplaypointerunrestricted
+onvrdisplaypresentchange
onwaiting
+onwaitingforkey
+onwarn
+onwarning
+onwebglcontextcreationerror
+onwebglcontextlost
+onwebglcontextrestored
+onwebkitmouseforcechanged
+onwebkitmouseforcedown
+onwebkitmouseforceup
+onwheel
+onzoom
oopf
Oopf
opar