Open English Wordnet
Nouns
(n)precaution, safeguard, guarda precautionary measure warding off impending danger or damage or injury etc.“he put an ice pack on the injury as a precaution”, “an insurance policy is a good safeguard”, “we let our guard down”
(n)caution, precaution, care, forethoughtjudiciousness in avoiding harm or danger“he exercised caution in opening the door”, “he handled the vase with care”