Radio
It could possibly be, OBU. Otherwise, known as the One Big Union. Not quite an invention, but it was created in the Roaring Twenties.
For the letter G you could do games and for n you could do nativism
This is the best invention because it is big.
All of Thomas Edison's inventions, the invention of the Airplane, WWI, and The Roaring Twenties.
Likely the big invention between 1925 and 1935 was the television. It was first demonstrated to scientists in 1929 and to the public in 1939.
Some of the characteristics of the Roaring Twenties was the Jazz Age, the Prohibitation, the Flappers, and the Red Scare. Also was the fads for bobbed hair, the production of Model T cars, and the invention of the radio.
big booty
A dolphin trainer who was a big girl in her twenties was drowned by a dolphin here.
a big clan of Russian scientists.
the invention of telephone.
There are approximately 15 twenties in 300. 400 will have 20 twenties.
The roaring twenties were a big time for Jazz and big bands. Louis Armstrong became wildly popular at the time with his hit "What a Wonderful World." Theater and silent films were also quite popular. Charlie Chaplin was one of the most recognizable people of the time.