We don't have synonyms for grains yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are grain, gains and grainy.
°An iron fish spear with a number of points half-barbed inwardly.
"1770: Served 5 lb of fish per man which was caught by striking with grains — journal of Stephen Forwood (gunner on ), 4 May 1770, quoted by Parkin (page 195)."
°An iron fish spear with a number of points half-barbed inwardly.
"1770: Served 5 lb of fish per man which was caught by striking with grains — journal of Stephen Forwood (gunner on ), 4 May 1770, quoted by Parkin (page 195)."