peril vs exist

peril is a noun but exist is not a noun.

Word	Noun	Adjective	Verb	Adverb
peril	Yes	No	Yes	No
exist	No	No	Yes	No

As verbs, exist is a hypernym of peril; that is, exist is a word with a broader meaning than peril:

Other hypernyms of peril include be.

peril (noun)	exist (noun)
a venture undertaken without regard to possible loss or injury
a source of danger; a possibility of incurring loss or misfortune
a state of danger involving risk

peril (verb)	exist (verb)
put in a dangerous, disadvantageous, or difficult position	have an existence, be extant
pose a threat to; present a danger to	support oneself