third tonsil vs tonsilla adenoidea

third tonsil and tonsilla adenoidea both are nouns.

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

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

third tonsil and tonsilla adenoidea: 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 pharyngealis.

third tonsil (noun)	tonsilla adenoidea (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)