The term for using an asterisk to replace a letter or group of letters is "grawlix." This practice is often employed to censor profanity or sensitive information in written text. By substituting letters with asterisks, the intended word is obscured while still being recognizable.
neon, pony, page, cage, gone
abdomen abysmal
The only capital letters which produce the same letter after being rotated 270 degrees are the letters 'O' and 'X'
dreidel
velvet
The school subject you're looking for is "History." It has 8 letters, and the 5th letter is "l."
soldier
Silverware is 10 letters, but not the ones you need. How about chopsticks?
testes
Bern (Switzerland)
Being. Began
Forty Love