martyrdom vs expiry

martyrdom and expiry both are nouns.

Word	Noun	Adjective	Verb	Adverb
martyrdom	Yes	No	No	No
expiry	Yes	No	No	No

As nouns, expiry is a hypernym of martyrdom; that is, expiry is a word with a broader meaning than martyrdom:

martyrdom: death that is imposed because of the person's adherence of a religious faith or cause
expiry: the event of dying or departure from life

Other hypernyms of martyrdom include death, decease.

martyrdom (noun)	expiry (noun)
death that is imposed because of the person's adherence of a religious faith or cause	the event of dying or departure from life
any experience that causes intense suffering	a coming to an end of a contract period