astronomy
Triathlon is a sport. It has nine letters.
Swaziland
The penguin is an aquatic bird. The name contains nine letters.
elephants
Elizabeth is a girl's name that contains nine letters.
Spaceship
fascinate
mosaicist
The longest state capital name in the United States is Sacramento, the capital of California. It has nine letters, making it the longest capital name among all U.S. state capitals. Other notable long capital names include Salt Lake City and Providence, but they are shorter than Sacramento.
Artichoke and asparagus are vegetables.
A nine letter abstract noun that starts with U is ultimatum.