rosette vs stem canker

rosette and stem canker both are nouns.

Word	Noun	Adjective	Verb	Adverb
rosette	Yes	No	No	No
stem canker	Yes	No	No	No

As nouns, rosette and stem canker are synonyms defined as:

Other synonyms of rosette include little potato, russet scab.

rosette (noun)	stem canker (noun)
an ornament or pattern resembling a rose that is worn as a badge of office or as recognition of having won an honor	rhizoctinia disease of potatoes
circular window filled with tracery
a cluster of leaves growing in crowded circles from a common center or crown (usually at or close to the ground)
rhizoctinia disease of potatoes