Synonyms and related words :
abba, dad, daddy, dead, dilute, diluted, fade, father, flat, flavorless, foster father, genitor, governor, gruelly, inane, indifferent, insipid, jejune, mild, milk-and-water, mushy, old man, pa, pap, papa, pater, paterfamilias, patriarch, pop, pops, pulpy, sapless, savorless, sire, spiceless, spongy, squashy, squelchy, squishy, squushy, stale, stepfather, tasteless, the old man, thin, unflavored, unsavory, vapid, washy, watered, watered-down, watery, weak, wishy-washy, yielding