| Word | Definitions | Synonyms |
|---|---|---|
| senile | (adjective) mentally or physically infirm with age | Synonyms: doddering, doddery, gaga |
| senior | (adjective) older; higher in rank; longer in length of tenure or service | - |
| (adjective) used of the fourth and final year in United States high school or college | Synonyms: fourth-year | |
| (adjective) advanced in years; (`aged' is pronounced as two syllables) | Synonyms: aged, elderly, older |