They are many: geezer, old-timer, senior, oldster, golden-ager, senior citizen, ancient, elder, retired person or old timer. Many of these will get you a sneer or worse.
Elders or seniors.
A miser.
Aging or growing older.
Elderly or senior years.
Crotchety or cantankerous.
Dotage, declining years, geriatrics, seniority, autumn of life...
The word 'folk' is both a noun (old folk or young folk) and an adjective (folk art or folk song).
I don't want to go to the old folks home. This question is a sentence with the word "folk" in it.
Another word for not old is young.
Albumen is the white part of an egg :)
"Ancient" is another word for very old.
No, "folk" is a noun referring to people or a particular group of people. It is not an adverb.
Another word for 40 year old is 4 decades. 8D
Another word for an old female cat is a grimalkin.
old
aged
You can't move to another town, but you can visit another town.
Old Town School of Folk Music was created in 1957.