ないさい【内妻】
a common-law wife
にいづま【新妻】
a newly-married woman
ひとづま【人妻】
〔既婚女性〕a married woman;〔他人の妻〕someone else's wife
ふさい【夫妻】
husband and wifeブラウン氏夫妻Mr. and Mrs. Brown/the Browns(▼後者は家族全員を指すこともある)
ほんさい【本妻】
one's legal [lawful] wife
ぼうさい【亡妻】
my deceased [late] wife
りょうさい【良妻】
a good wife良妻賢母a good wife and wise mother