chestnut canker vs chestnut-bark disease

chestnut canker and chestnut-bark disease both are nouns.

Word	Noun	Adjective	Verb	Adverb
chestnut canker	Yes	No	No	No
chestnut-bark disease	Yes	No	No	No

As nouns, chestnut canker and chestnut-bark disease are synonyms defined as:

chestnut canker and chestnut-bark disease: a disease of American chestnut trees

Other synonyms of chestnut canker include chestnut blight.

chestnut canker (noun)	chestnut-bark disease (noun)
a disease of American chestnut trees	a disease of American chestnut trees