The term "illderly" refers to individuals who are both ill and elderly, often requiring special care and attention. While it is crucial to understand this term, it is also essential to explore synonyms that can be used interchangeably. Some alternatives for "illderly" include "ailing seniors", emphasizing the elderly population's health conditions. Another synonym could be "frail elderly", which focuses on the vulnerability and physical weakness of older individuals. "Sickly seniors" could also be used as it conveys a similar meaning. These synonyms help to convey the specific health-related challenges faced by the aging population in a sensitive and comprehensive manner.