snowstorm vs blizzard

snowstorm and blizzard both are nouns.

Word	Noun	Adjective	Verb	Adverb
snowstorm	Yes	No	No	No
blizzard	Yes	No	No	No

As nouns, snowstorm and blizzard are synonyms defined as:

snowstorm and blizzard: a storm with widespread snowfall accompanied by strong winds

snowstorm (noun)	blizzard (noun)
a storm with widespread snowfall accompanied by strong winds	a series of unexpected and unpleasant occurrences
	a storm with widespread snowfall accompanied by strong winds