Antonyms of adj spindly

1 sense of spindly

Sense 1
lank, spindly -- (long and lean)

INDIRECT (VIA thin) -> fat -- (having an (over)abundance of flesh; "he hadn't remembered how fat she was")

Similarity of adj spindly

1 sense of spindly

Sense 1
lank, spindly -- (long and lean)
       => thin (vs. fat), lean -- (lacking excess flesh; "you can't be too rich or too thin"; "Yon Cassius has a lean and hungry look"-Shakespeare)