harbinger vs herald

harbinger and herald both are nouns.

Word	Noun	Adjective	Verb	Adverb
harbinger	Yes	No	Yes	No
herald	Yes	No	Yes	No

As nouns, harbinger and herald are synonyms defined as:

harbinger and herald: something that precedes and indicates the approach of something or someone

Other synonyms of harbinger include forerunner, precursor, predecessor.

As verbs, harbinger and herald are synonyms defined as:

Other synonyms of harbinger include announce, annunciate, foretell.

harbinger (noun)	herald (noun)
something that precedes and indicates the approach of something or someone	something that precedes and indicates the approach of something or someone
	(formal) a person who announces important news

harbinger (verb)	herald (verb)
foreshadow or presage	foreshadow or presage
	praise vociferously
	greet enthusiastically or joyfully