peril vs endanger

peril is a noun but endanger is not a noun.

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

As verbs, peril and endanger are synonyms defined as:

peril and endanger: put in a dangerous, disadvantageous, or difficult position

Other synonyms of peril include expose, queer, scupper.

As verbs, peril and endanger are synonyms defined as:

Other synonyms of peril include imperil, jeopardise, jeopardize, menace, threaten.

peril (noun)	endanger (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)	endanger (verb)
put in a dangerous, disadvantageous, or difficult position	put in a dangerous, disadvantageous, or difficult position
pose a threat to; present a danger to	pose a threat to; present a danger to