larynx vs organ of speech

larynx and organ of speech both are nouns.

Word	Noun	Adjective	Verb	Adverb
larynx	Yes	No	No	No
organ of speech	Yes	No	No	No

As nouns, organ of speech is a hypernym of larynx; that is, organ of speech is a word with a broader meaning than larynx:

larynx: a cartilaginous structure at the top of the trachea; contains elastic vocal cords that are the source of the vocal tone in speech
organ of speech: any of the organs involved in speech production

Other hypernyms of larynx include speech organ, vocal organ, cartilaginous structure.

larynx (noun)	organ of speech (noun)
a cartilaginous structure at the top of the trachea; contains elastic vocal cords that are the source of the vocal tone in speech	any of the organs involved in speech production