| canker | (noun) a pernicious and malign influence that is hard to get rid of | Synonyms: pestilence |
|---|
| (noun) an ulceration (especially of the lips or lining of the mouth) | Synonyms: canker sore |
| (noun) a fungal disease of woody plants that causes localized damage to the bark | - |
| cankerweed | (noun) herb of northeastern North America having drooping clusters of yellowish-white flowers; sometimes placed in genus Prenanthes | Synonyms: Nabalus alba, Prenanthes alba, white lettuce |
|---|
| cankerworm | (noun) green caterpillar of a geometrid moth; pest of various fruit and shade trees | - |
|---|