bioassay vs immunoassay

bioassay and immunoassay both are nouns.

Word	Noun	Adjective	Verb	Adverb
bioassay	Yes	No	Yes	No
immunoassay	Yes	No	No	No

As nouns, immunoassay is a hyponym of bioassay; that is, immunoassay is a word with a more specific, narrower meaning than bioassay:

bioassay: appraisal of the biological activity of a substance by testing its effect on an organism and comparing the result with some agreed standard
immunoassay: identification of a substance (especially a protein) by its action as an antigen

Other hyponyms of bioassay include immunochemical assay, pregnancy test.

bioassay (noun)	immunoassay (noun)
appraisal of the biological activity of a substance by testing its effect on an organism and comparing the result with some agreed standard	identification of a substance (especially a protein) by its action as an antigen

bioassay (verb)	immunoassay (verb)
subject to a bio-assay