Synonyms and related words :
bland, dead, dilute, diluted, distasteful, fade, flat, flavorless, gruelly, ill-flavored, inane, indifferent, insipid, jejune, mild, milk-and-water, pappy, pulpy, sapless, spiceless, stale, tasteless, thin, unappetizing, unflavored, unpleasing, unsavory, vapid, washy, watered, watered-down, watery, weak, wishy-washy