mycoplasmal pneumonia vs atypical pneumonia

mycoplasmal pneumonia and atypical pneumonia both are nouns.

Word	Noun	Adjective	Verb	Adverb
mycoplasmal pneumonia	Yes	No	No	No
atypical pneumonia	Yes	No	No	No

As nouns, mycoplasmal pneumonia and atypical pneumonia are synonyms defined as:

mycoplasmal pneumonia and atypical pneumonia: an acute respiratory disease marked by high fever and coughing; caused by mycoplasma; primarily affecting children and young adults

Other synonyms of mycoplasmal pneumonia include primary atypical pneumonia.

mycoplasmal pneumonia (noun)	atypical pneumonia (noun)
an acute respiratory disease marked by high fever and coughing; caused by mycoplasma; primarily affecting children and young adults	an acute respiratory disease marked by high fever and coughing; caused by mycoplasma; primarily affecting children and young adults