The term BASIC, CHEMICALLY refers to a substance that is neither acidic nor ALKALINE. The crossword solutions for this term are NONACID (7 letters) and ALKALINE (8 letters). Acids and bases are two of the most important classes of chemical compounds, and they are characterized by their ability to donate or accept protons. Acids are compounds that donate protons, while bases accept protons. Nonacids and alkalines are substances that do not donate or accept protons, and therefore are neither acidic nor basic.