How do you say worm in Japanese?
— 虫 (むし, mushí); 虫螻 (むしけら, mushikera); 虫

Related synonyms for worm in Japanese
insect昆虫 (こんちゅう, konchū); 虫 (むし, mushi)
louse虱 (しらみ, shirami); シラミ (shirami); 寄生虫 (きせいちゅう, kiseichū)