妻【つま】
wife, garnish (esp. one served with sashimi), trimmings, accompaniment, side (remark)
夫妻【ふさい】
husband and wife, married couple
妻子【さいし】
wife and children, wife
稲妻【いなずま】
lightning, flash of lightning, lightning bolt
良妻【りょうさい】
good wife
後妻【ごさい】
second wife