react vs greet

react and greet both are verbs.

Word	Noun	Adjective	Verb	Adverb
react	No	No	Yes	No
greet	No	No	Yes	No

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

react (verb)	greet (verb)
undergo a chemical reaction; react with another substance under certain conditions	react to in a certain way
show a response or a reaction to something	express greetings upon meeting someone
act against or in opposition to	send greetings to
	be perceived by