different between dubby vs nubby

English

dub +? -y

dubby (comparative more dubby, superlative most dubby)

(music) In the style of dub music; having been heavily remixed, particularly with reduced vocals or emphasised bass.
(dated, dialectal) stubby, stumpy; Lacking shapeliness or finesse.
(dated, dialectal) wet and muddy; dirty

nub +? -y. Compare knobby.

nubby (comparative nubbier, superlative nubbiest)

Knobbly; covered with small knobs.
- 2007, Marie Clayton, The Ultimate A to Z Companion to 1,001 Needlecraft Terms:
  noil A type of silk, sometimes incorrectly called raw silk, with a nubby feel and a low sheen.
Nub-like, resembling a small bump or protrusion; stubby.
- 2010, John Leigh Walters, A Very Capable Life: The Autobiography of Zarah Petri, page 170:
  Now we are sitting in a circle and each is given a stenographer's pad, the kind with the spring spine, and a nubby pencil, a pencil of quarter size so it can't be used as a weapon [...]

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