diagnostics vs nosology

diagnostics and nosology both are nouns.

Word	Noun	Adjective	Verb	Adverb
diagnostics	Yes	No	No	No
nosology	Yes	No	No	No

As nouns, diagnostics and nosology are synonyms defined as:

diagnostics and nosology: the branch of medical science dealing with the classification of disease

diagnostics (noun)	nosology (noun)
the branch of medical science dealing with the classification of disease	the branch of medical science dealing with the classification of disease