lidless vs alert

lidless is not a noun while alert is a noun.

Word	Noun	Adjective	Verb	Adverb
lidless	No	Yes	No	No
alert	Yes	Yes	Yes	No

lidless (noun)	alert (noun)
	a warning serves to make you more alert to danger
	an automatic signal (usually a sound) warning of danger
	condition of heightened watchfulness or preparation for action

lidless (adjective)	alert (adjective)
not having or covered with a lid or lids	engaged in or accustomed to close observation
always watchful	mentally perceptive and responsive
having no lid	quick and energetic

lidless (verb)	alert (verb)
	warn or arouse to a sense of danger or call to a state of preparedness