We don't have synonyms for pandybat yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pandya and candybar.
(n) :
a stout leather strap reinforced internally with whalebone or even lead and used to inflict punishment - especially by using it to strike against the open uplifted hands on schoolboys
"the soutane sleeve swished again as the pandybat was lifted and a loud crashing sound and a fierce maddening...pain made his hand shrink together... - Portrait of the Artist as a Young Man by James Joyce, 1916"
(n) :
a stout leather strap reinforced internally with whalebone or even lead and used to inflict punishment - especially by using it to strike against the open uplifted hands on schoolboys
"the soutane sleeve swished again as the pandybat was lifted and a loud crashing sound and a fierce maddening...pain made his hand shrink together... - Portrait of the Artist as a Young Man by James Joyce, 1916"