moderator vs nuclear reactor

moderator and nuclear reactor both are nouns.

Word	Noun	Adjective	Verb	Adverb
moderator	Yes	No	No	No
nuclear reactor	Yes	No	No	No

moderator (noun)	nuclear reactor (noun)
someone who mediates disputes and attempts to avoid violence	(physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
someone who presides over a forum or debate
in the Presbyterian church, the officer who presides over a synod or general assembly
any substance used to slow down neutrons in nuclear reactors