How To Make a Good Halloween Pun

Since events are being planned with names that try to make a play on words off the word "October", I think a friendly reminder is in order.

Friendly reminder: Not every one-syllable word sounds good as the first syllable of "October".

Examples (not ones I've actually seen): Tropetober, Friendtober, and Greentober.

Recommendation: Ask yourself "Since I'll be removing "Oc" to be putting in my word, does my word rhyme with "Oc", end with the c sound, or at least have the same "ah" sound as "Oct"?"
If the answer to all of these is "no", consider renaming your event to a more natural portmanteau so that it stands out more to your audience.
Instead of naming your women's-only Halloween party "Girltober", you might consider naming it "Galoween".
Instead of naming your Mickey Mouse marathon "Mousetober", you might consider naming it "Haunted Mouse".
Instead of naming your month of movie nights "Filmtober", you might consider naming it "Flick-or-Treat".

You might even find it's a better idea to do this event during another month. Not because the pun would be better, but so you can hold your event during a month when people aren't as overwhelmed with events. A car sale will be just as popular in "Vanuary" as it would be in "Vantober", a bro's night will be just as enjoyed during "Brovember" as it would be in "Brotober", and an Emergency Preparation course will be just as popular during "Preptember" as it would be in "Preptober". This may not be practical in every situation, but at least once, it may be a good idea, since people already have so many events to attend during the month of Halloweevents.
You may also find (for various reasons) that after completing Grapetober, you'd like to hold the event again during Grapril.

I was very pleased recently to see a flyer for Rocktober. I hope to someday see events like Walktober, Blocktober, and Chalktober.

That said, the good puns only stand out because they're surrounded by so many forced pormanteaus.
So to help the good puns stand out, I'd like to wish everyone a happy Puntober and have a great Punoween.