mimizu ミミズ

Translation

mimizu means "Earthworm" in English.

mimizu is normally written with katakana, as ミミズ.
mimizu written with hiragana is みみず.

mimizu written with kanji is 蚯蚓.
This word contains non-jouyou kanji 常用漢字.

mimizu is a jukujikun 熟字訓 reading for 蚯蚓 in this word. That is: those kanji are only read that way when they come together like that.

memezu メメズ.

Beware: some kanji that are difficult to handwrite are easy to type on the computer, which may skew the usage statistics.