Larynx and Speech organ

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.

Speech organ and larynx are semantically related. In some cases you can use "Speech organ" instead a noun "Larynx".

Speech organ noun - Any of the organs involved in speech production.

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