survival vs custom

survival and custom both are nouns.

Word	Noun	Adjective	Verb	Adverb
survival	Yes	No	No	No
custom	Yes	Yes	No	No

As nouns, custom is a hyponym of survival; that is, custom is a word with a more specific, narrower meaning than survival:

Other hyponyms of survival include usage, usance, hangover, holdover.

survival (noun)	custom (noun)
something that survives	accepted or habitual practice
a natural process resulting in the evolution of organisms best adapted to the environment	habitual patronage
a state of surviving; remaining alive	a specific practice of long standing
	money collected under a tariff

survival (adjective)	custom (adjective)
	made according to the specifications of an individual