Larynx and Organ of speech

Larynx noun - 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 and larynx are semantically related. In some cases you can use "Organ of speech" instead a noun "Larynx".

Organ of speech noun - Any of the organs involved in speech production.

Larynx and organ of speech are semantically related. Sometimes you can replace term "Larynx" with "Organ of speech", this terms are similar.