throat infection vs streptococcus tonsilitis

throat infection and streptococcus tonsilitis both are nouns.

Word	Noun	Adjective	Verb	Adverb
throat infection	Yes	No	No	No
streptococcus tonsilitis	Yes	No	No	No

As nouns, throat infection and streptococcus tonsilitis are synonyms defined as:

throat infection and streptococcus tonsilitis: an infection of the oral pharynx and tonsils by streptococcus

Other synonyms of throat infection include septic sore throat, strep throat, streptococcal sore throat.

throat infection (noun)	streptococcus tonsilitis (noun)
an infection of the oral pharynx and tonsils by streptococcus	an infection of the oral pharynx and tonsils by streptococcus