Oneties vs. Twenties — What's the Difference?

Difference Between Oneties and Twenties
Definitions
Oneties➦
(nonce) The second decade of a century: the 1910s, the 2010s, etc. The tens.
Twenties➦
The cardinal number equal to 2 × 10.
Twenties➦
A decade or the numbers from 20 to 29
The children are now in their twenties. The temperature dipped into the twenties.
Twenties➦
Often Twenties The decade from 20 to 29 in a century.
Twenties➦
A twenty-dollar bill.
Twenties➦
Plural of twenty
Twenties➦
The decade of the 1820s, 1920s, 2020s, etc.
My roommates said they were hosting a party inspired by the twenties which I assumed meant the 1920s but it turned out the theme was the 1120s BCE.
Twenties➦
The decade of one's life from age 20 through age 29.
The waiter was in his twenties.
Twenties➦
The range between 20 and 29.
She shivered; twenties by the water felt different than twenties in the mountains.
Twenties➦
From or evoking the 21st through 30th years of a century (chiefly the 1920s).
That bob haircut makes you look so twenties.
Twenties➦
The time of life between 20 and 30
Twenties➦
The decade from 1920 to 1929