Words belonging to aging and old

Words belonging to aging and old-

The Greek root for old man is geron. The words from this root are,

• Geriatrician- specialist of medical care of old people.
• Gerontology- the scientific study of aging and its effects
• Gerontocracy- a system of government in which the elders are chosen as rulers.

 The Latin word for old is senex, the derived words from this are,

• Senile-

mentally less acute in later life: forgetful, confused, or otherwise mentally less acute in later life relating to later life: occurring in or believed to be characteristic of later life, especially the period after the age of 65 years. The noun is senility.

• Senescent-  Aging, growing old.(The same suffix is used in the word adolescent, growing into adult, convalescent, growing healthy again, and obsolescent, growing or becoming obsolete) The noun is senescence.
• Senior-  older, noun- seniority.
• Senate-  originally a council for older, presumably wiser, citizens.