tell vs warn

tell and warn both are verbs.

Word	Noun	Adjective	Verb	Adverb
tell	No	No	Yes	No
warn	No	No	Yes	No

As verbs, warn is a hyponym of tell; that is, warn is a word with a more specific, narrower meaning than tell:

tell: give instructions to or direct somebody to do something with authority
warn: ask to go away

Other hyponyms of tell include direct, instruct, command, require, call, send for, prescribe.

tell (verb)	warn (verb)
discern or comprehend	notify of danger, potential harm, or risk
mark as different	advise or counsel in terms of someone's behavior
let something be known	notify, usually in advance
narrate or give a detailed account of	ask to go away
give instructions to or direct somebody to do something with authority
give evidence
express in words
inform positively and with certainty and confidence