| Rating | Solver | Clue |
|---|---|---|
| NIACIN | Nicotinic Acid | |
| ISONICOTINIC | Pertaining to, or designating, an acid isomeric with nicotinic acid. | |
| NICOTINIC | Pertaining to, or derived from, nicotine; nicotic; -- used specifically to designate an acid related to pyridine, obtained by the oxidation of nicotine, and called nicotinic acid. |