countersuit vs causa

countersuit and causa both are nouns.

Word	Noun	Adjective	Verb	Adverb
countersuit	Yes	No	No	No
causa	Yes	No	No	No

As nouns, causa is a hypernym of countersuit; that is, causa is a word with a broader meaning than countersuit:

countersuit: a suit brought against someone who has sued you
causa: a comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy

Other hypernyms of countersuit include case, cause, lawsuit, suit.

countersuit (noun)	causa (noun)
a suit brought against someone who has sued you	a comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy