The best replacement for elderly is older.

The best alternatives to elderly are rated as following:
★★★★★  older
★★★★  young
★★★★  seniors
★★★  elder
★★★  elderlies
★★★  youth
★★  prisoners
★  aging
  adults
  infants

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

Other search terms related to elderly and their ratings are:
★★★★★ pneumonia
★ swollen legs and feet
caregivers
mental illness
You have in mind a companion for elderly and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of elderly in all years. Click on graph for more.
elderly
older
young