The term 'Countess Spouse' can be broken down into four crossword solutions: EARL (4 letters), Earls (5 letters), LADY (4 letters), Olivia (6 letters), and MILADY (6 letters). An EARL is a British nobleman ranking above a viscount and below a marquess, while Earls is the plural form of the same word. LADY is a title of respect for a woman, typically the wife or daughter of a lord or a knight. Olivia is a female given name derived from Latin, meaning 'olive tree'. Lastly, MILADY is an archaic term for a woman of high social standing, often used to refer to a countess. Therefore, the term 'Countess Spouse' can be broken down into the crossword solutions of EARL, Earls, LADY, Olivia, and MILADY, all of which refer to a nobleman or woman of high social standing.