oneties means the second decade of a century: the 1910s, the 2010s, etc. The tens.
Etymology
From one + -ties (“plural of -ty”), in imitation of the names of other decades (twenties, thirties, etc).
noun
- The second decade of a century: the 1910s, the 2010s, etc. The tens.“Our readers — and contributors — are apt to elect a good deal according to years. The seventies and eighties, we may suppose, are concerned for the large educational and cultural interests of their Alma Mater; the nineties are deep in the practical and business activities; the noughties are not naughty, but still young enough to sport a fantastic costume at reunion and let the college wag as it wi”