lis pendens vs action at law

lis pendens and action at law both are nouns.

Word	Noun	Adjective	Verb	Adverb
lis pendens	Yes	No	No	No
action at law	Yes	No	No	No

As nouns, action at law is a hypernym of lis pendens; that is, action at law is a word with a broader meaning than lis pendens:

lis pendens: a pending lawsuit
action at law: a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong

Other hypernyms of lis pendens include action, legal action.

lis pendens (noun)	action at law (noun)
a pending lawsuit	a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong