iodide vs sodium iodide

iodide and sodium iodide both are nouns.

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

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

Other hyponyms of iodide include potassium iodide, hydrogen iodide, silver iodide.

iodide (noun)	sodium iodide (noun)
a salt or ester of hydriodic acid	a crystalline salt used like potassium iodide