throat infection vs streptococcal sore throat

throat infection and streptococcal sore throat both are nouns.

Word	Noun	Adjective	Verb	Adverb
throat infection	Yes	No	No	No
streptococcal sore throat	Yes	No	No	No

As nouns, throat infection and streptococcal sore throat are synonyms defined as:

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

Other synonyms of throat infection include septic sore throat, strep throat, streptococcus tonsilitis.

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