Business Wire: Disguise Offers a Spooktacular List of Wicked and Fun Halloween Costumes for Kids and Adults | Business Wire
Disguise Offers a Spooktacular List of Wicked and Fun Halloween Costumes for Kids and Adults | Business Wire
CNN: The best Halloween costumes for adults: Stranger Things, ’80s and more
Need some Halloween inspo? We talked to the experts about the best Halloween costumes for adults to find out the trends you’ll be seeing on the streets and at the office party this year.
DualShockers: Check Out All of the Dead or Alive 6 Deluxe Edition Costumes
Check Out All of the Dead or Alive 6 Deluxe Edition Costumes
"Adult children" comes from "adult children of alcoholics", but now has broader reference to adults who were abused emotionally, physically or sexually in childhood.
Merriam-Webster has an entry for half-orphan, meaning someone with only one living parent. They say specifically a child, which would match the usual usage of "orphan" (as mentioned in the question), but it might be used of an adult sometimes, either jocularly or by extension. This doesn't distinguish which parent is dead, but could be combined with a further explanation if it matters.