The best replacement for costumes is halloween.

The best alternatives to costumes are rated as following:
★★★★★  halloween
★★★★  masks
★★  couples
★★  clothes
★★  clothing
★  store bought
★  leg avenue
  brazilian carnival costumes

Your alternative for costumes is not listed? Suggest!
Speaking about costumes, one probably shouldn't forget about characters.

Other search terms related to costumes and their ratings are:
★★★★★ characters
You have in mind a companion for costumes and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of costumes in all years. Click on graph for more.
costumes
halloween
masks