alert vs zippy

alert is a noun but zippy is not a noun.

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

As adjectives, alert and zippy are synonyms defined as:

Other synonyms of alert include brisk, lively, merry, rattling, snappy, spanking.

alert (noun)	zippy (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

alert (adjective)	zippy (adjective)
engaged in or accustomed to close observation	quick and energetic
mentally perceptive and responsive	marked by lively action
quick and energetic

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