lost vs irrecoverable

lost is a noun but irrecoverable is not a noun.

Word	Noun	Adjective	Verb	Adverb
lost	Yes	Yes	No	No
irrecoverable	No	Yes	No	No

lost (noun)	irrecoverable (noun)
people who are destined to die soon

lost (adjective)	irrecoverable (adjective)
no longer in your possession or control; unable to be found or recovered	incapable of being recovered or regained
spiritually or physically doomed or destroyed
not gained or won
unable to function; without help
not caught with the senses or the mind
perplexed by many conflicting situations or statements; filled with bewilderment
deeply absorbed in thought
having lost your bearings; confused as to time or place or personal identity
cannot be recovered or regained