Question

Plentiful is to abundant as polished is to

Answer 1

Plentiful is to abundant as polished is to shiny. 

Answer 2

Answer:

Elegant, refined.

Explanation:

The sentence reads -

Plentiful is to abundant as polished is to refined / shiny / elegant.

The synonym of plentiful is abundant, ample, rich etc, having a positive connotation in the use of the word. Likewise, the synonym for polished will be refined, shiny or elegant. This word also have a positive connotation in it's use. Polished means to be experienced, or something elegant, far beyond normal appearance.