third tonsil vs tonsilla pharyngealis

third tonsil and tonsilla pharyngealis both are nouns.

Word	Noun	Adjective	Verb	Adverb
third tonsil	Yes	No	No	No
tonsilla pharyngealis	Yes	No	No	No

As nouns, third tonsil and tonsilla pharyngealis are synonyms defined as:

third tonsil and tonsilla pharyngealis: a collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx)

Other synonyms of third tonsil include adenoid, Luschka's tonsil, pharyngeal tonsil, tonsilla adenoidea.

third tonsil (noun)	tonsilla pharyngealis (noun)
a collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx)	a collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx)