subatomic particle names and other such "atomic objects"
greetings, light and shadow
subtle differences and similarities between words for light, shadow, secret, and so on
"Even monkeys fall from trees" (even experts make mistakes)
kanji related by the "monkey" radical ("en")
[same picture? - monkey stuff]
Words that mean light and shadow and secret and password and how they relate and don't relate in an "n-space kanji network"
Words to do with washing and bathing and how they relate by readings and radicals and other kanji