lye vs sodium hydroxide

lye and sodium hydroxide both are nouns.

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

As nouns, sodium hydroxide is a hyponym of lye; that is, sodium hydroxide is a word with a more specific, narrower meaning than lye:

lye: a strong solution of sodium or potassium hydroxide
sodium hydroxide: a strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds

Other hyponyms of lye include caustic potash, potash, potassium hydroxide, caustic soda.

lye (noun)	sodium hydroxide (noun)
a strong solution of sodium or potassium hydroxide	a strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds