intolerance vs zealotry

intolerance and zealotry both are nouns.

Word	Noun	Adjective	Verb	Adverb
intolerance	Yes	No	No	No
zealotry	Yes	No	No	No

As nouns, zealotry is a hyponym of intolerance; that is, zealotry is a word with a more specific, narrower meaning than intolerance:

intolerance: unwillingness to recognize and respect differences in opinions or beliefs
zealotry: excessive intolerance of opposing views

Other hyponyms of intolerance include narrow-mindedness, narrowness, bigotry, fanaticism, fanatism, religionism, zero tolerance.

intolerance (noun)	zealotry (noun)
impatience with annoyances	excessive intolerance of opposing views
unwillingness to recognize and respect differences in opinions or beliefs