I don't have an answer (yet) but it's not the same as asking "longest word where the letters occur once" as this questioner is asking for it to be alphabetical.
"Empty" is the longest I can think of at the moment.
yes
Fart Blaster may occer, but some tsunamies may also occer
ever 4 years
Yes
When the Earth casts a shadow on the moon.
learn to spell and someone might answer your question
November ,5 1867
at the end of a game when the game is tied
the earth tilts a diffrent way from the sun
There are ten events in a decathlon.
Every 150 years a sesquicentennial occurs.
it occurs every wednesday and one of the national parks