excrescence

1 an abnormal mass of tissue concerned about the weird excrescence that seemed to be developing on his hand Synonyms growth, excrescency, lump, neoplasm, tumorRelated Words outgrowth; cancer, carcinoma, lymphoma, malignancy, melanoma, polyp; cyst, tubercle, wart

2 something that spoils the appearance or completeness of a thing local residents regard the hulking apartment building as a hideous excrescence on their once-lovely street Synonyms blight, blotch, defect, deformity, disfigurement, blemish, excrescency, fault, flaw, imperfection, mar, mark, pockmark, scarRelated Words abnormality, distortion, irregularity, malformation, misshape; bug, glitch, kink; blot, blur, spot, stain, taint; damage, defacement, impairment, injury; failing, weaknessNear Antonyms adornment, decoration, embellishment, enhancement, ornament