[olsgaarddk]

This is a really good summary.

For anyone who want to geek this out further, I highly recommend the the introduction in "Decoding Kanji: A Practical Approach to Learning Look-alike Characters" By Yaeko Sato Habein [1]. Despite being a workbook for intermediate students, the introduction really goes all-in on this stuff and treats the topic both very academically, but it also a treasure trove of kanji related "Fun facts", and the appendix has interesting compilations such as "Pairs of homonymous kanji compounds with one kanji in common".

[1] https://www.amazon.co.uk/Decoding-Kanji-Practical-Look-alike...