security measures vs precaution

security measures and precaution both are nouns.

Word	Noun	Adjective	Verb	Adverb
security measures	Yes	No	No	No
precaution	Yes	No	No	No

As nouns, precaution is a hypernym of security measures; that is, precaution is a word with a broader meaning than security measures:

security measures: measures taken as a precaution against theft or espionage or sabotage etc.
precaution: a precautionary measure warding off impending danger or damage or injury etc.

Other hypernyms of security measures include guard, safeguard.

security measures (noun)	precaution (noun)
measures taken as a precaution against theft or espionage or sabotage etc.	a precautionary measure warding off impending danger or damage or injury etc.
	the trait of practicing caution in advance
	judiciousness in avoiding harm or danger