respiratory disease vs respiratory disorder

respiratory disease and respiratory disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
respiratory disease	Yes	No	No	No
respiratory disorder	Yes	No	No	No

As nouns, respiratory disease and respiratory disorder are synonyms defined as:

respiratory disease and respiratory disorder: a disease affecting the respiratory system

Other synonyms of respiratory disease include respiratory illness.

respiratory disease (noun)	respiratory disorder (noun)
a disease affecting the respiratory system	a disease affecting the respiratory system