sodium hydroxide vs hydroxide

sodium hydroxide and hydroxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
sodium hydroxide	Yes	No	No	No
hydroxide	Yes	No	No	No

As nouns, hydroxide is a hypernym of sodium hydroxide; that is, hydroxide is a word with a broader meaning than sodium hydroxide:

sodium hydroxide: a strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds
hydroxide: a compound of an oxide with water

Other hypernyms of sodium hydroxide include hydrated oxide, lye.

sodium hydroxide (noun)	hydroxide (noun)
a strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds	a compound of an oxide with water
	a chemical compound containing the hydroxyl group