<unk> , from Latin 'stertere' to snore, and first used in 1804, is a noisy breathing sound like snoring. It is caused by partial obstruction of the upper airways, at the level of the pharynx and nasopharynx. It is distinguished from stridor by its pitch.<unk>  is low-pitched, and can occur when breathing in, out or both.<unk>  and stridor can occur together, such as when adenotonsillar hypertrophy and laryngomalacia occur together.
Stertor
Allergist
Retractor 
Vinegar
Drusen
Steris
Orthotist
Tongue cleaner