canker

1. n. A corroding or sloughing ulcer; esp. a spreading gangrenous ulcer or collection of ulcers in or about the mouth; -- called also water canker, canker of the mouth, and noma. Source: opted

2. n. Anything which corrodes, corrupts, or destroy. Source: opted

3. n. A disease incident to trees, causing the bark to rot and fall off. Source: opted

4. n. An obstinate and often incurable disease of a horse's foot, characterized by separation of the horny portion and the development of fungoid growths; -- usually resulting from neglected thrush. Source: opted

5. n. A kind of wild, worthless rose; the rose">dog-rose. Source: opted

6. v. t. To affect as a canker; to eat away; to corrode; to consume. Source: opted

7. v. t. To infect or pollute; to corrupt. Source: opted

8. v. i. To waste away, grow rusty, or be oxidized, as a mineral. Source: opted

9. v. i. To be or become diseased, or as if diseased, with canker; to grow corrupt; to become venomous. Source: opted

10. n. a fungal disease of woody plants that causes localized damage to the bark Source: wordnet

11. n. an ulceration (especially of the lips or lining of the mouth) Source: wordnet

12. n. a pernicious and malign influence that is hard to get rid of Source: wordnet

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