weather eye vs watchfulness

weather eye and watchfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
weather eye	Yes	No	No	No
watchfulness	Yes	No	No	No

As nouns, weather eye and watchfulness are synonyms defined as:

Other synonyms of weather eye include vigilance.

weather eye (noun)	watchfulness (noun)
vigilant attentiveness	vigilant attentiveness
	the process of paying close and continuous attention