The best replacement for gazebos is canopies.

The best alternatives to gazebos are rated as following:
★★★★★  canopies
★★★★  pergolas
★★  tents
★★  awnings
★  sun shelters
  arches

Your alternative for gazebos is not listed? Suggest!
Speaking about gazebos, one probably shouldn't forget about hot tubs.

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



Google Trends

Scale is based on the average worldwide traffic of gazebos in all years. Click on graph for more.
gazebos
canopies
pergolas