peril vs perilous

peril is a noun but perilous is not a noun.

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

peril (noun)	perilous (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 (adjective)	perilous (adjective)
	fraught with danger

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