Yes, all these words spelled as JITEN. But they are actually a different word for a different type of book.
To analyze the difference between homonym in Japanese, we could easily
analyze them based on the kanji they used. Usually, they will have
In 辞典,the kanji used is 辞 which means terms/expressions. This is
the word for the standard language dictionary such as the Japanese –
English dictionary. In 字典, the kanji used is 字 which means characters. It also
refers to 漢字 (kanji). Therefore it means a dictionary which holds
in-depth information about Japanese characters.
While in 事典, the kanji used is 事 which means things/facts. It’s a
book that holds information about facts. In another language, this is a
word for an encyclopedia.
Now you know what is the difference between all these JITEN! Happy learning! ｡ﾟ✶ฺ.ヽ(*´∀`*)ﾉ.✶ฺﾟ｡