apt vs liable

apt and liable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
apt	No	Yes	No	No
liable	No	Yes	No	No

As adjectives, apt and liable are synonyms defined as:

apt and liable: at risk of or subject to experiencing something usually unpleasant

apt (adjective)	liable (adjective)
being of striking appropriateness and pertinence	at risk of or subject to experiencing something usually unpleasant
(usually followed by `to') naturally disposed toward	held legally responsible
mentally quick and resourceful	(often followed by `to') likely to be affected with
at risk of or subject to experiencing something usually unpleasant	subject to legal action