pleader vs attorney

pleader and attorney both are nouns.

Word	Noun	Adjective	Verb	Adverb
pleader	Yes	No	No	No
attorney	Yes	No	No	No

As nouns, attorney is a hypernym of pleader; that is, attorney is a word with a broader meaning than pleader:

pleader: a lawyer who pleads cases in court
attorney: a professional person authorized to practice law; conducts lawsuits or gives legal advice

Other hypernyms of pleader include lawyer.

pleader (noun)	attorney (noun)
a lawyer who pleads cases in court	a professional person authorized to practice law; conducts lawsuits or gives legal advice