galvanizer vs leader

galvanizer and leader both are nouns.

Word	Noun	Adjective	Verb	Adverb
galvanizer	Yes	No	No	No
leader	Yes	No	No	No

As nouns, leader is a hypernym of galvanizer; that is, leader is a word with a broader meaning than galvanizer:

galvanizer (noun)	leader (noun)
a leader who stimulates and excites people to action	a featured article of merchandise sold at a loss in order to draw customers
a skilled worker who coats iron or steel with zinc	a person who rules or guides or inspires others