different between rubish vs lubish

English

rube +? -ish

rubish (comparative more rubish, superlative most rubish)

Like a rube.
- 1992, Donald Barthelme, Kim A. Herzinger, The teachings of Don B.
  I suppose I am a rubish hayseed in some sense, full of down-home notions that contradict the more sophisticated notions of my colleagues.

From Middle Low German lübsch or Middle Dutch lubesch, both ("of Lübeck"). Compare German lübisch (“of Lübeck”).

lubish (comparative more lubish, superlative most lubish)

(monetary, historical) Relating to denominations belonging to a money of account formerly in extensive mercantile use in North Germany.
(Britain dialectal) Genuine; authorised; sterling.

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