Spousal, n. — Webster enters it under “spousal”
Etymology: [See Espousal, Spouse.]
Marriage; nuptials; espousal; -- generally used in the plural; as, the spousals of Hippolita. Dryden. Boweth your head under that blissful yoke . . . Which that men clepeth spousal or wedlock. Chaucer. the spousals of the newborn year. Emerson.
1 other Webster entry under this spelling
Spousal, a.
Of or pertaining to a spouse or marriage; nuptial; matrimonial; conjugal; bridal; as, spousal rites; spousal ornaments. Wordsworth.
Shades of meaning
Fernald has no entry of its own for spousals; he lists it under marriage.
He lists it without comment; the entries above explain its neighbors.