In many verses the Qur'an refers to the wives of certain people (some Prophets, Pharaoh etc.) but some times the word wife is referred to as imara(tu) امرأة (which is always translated wife of) like in:
Allah presents an example of those who disbelieved: the wife of Noah and the wife of Lot. They were under two of Our righteous servants but betrayed them, so those prophets did not avail them from Allah at all, and it was said, "Enter the Fire with those who enter." (66:10)
ضَرَبَ اللَّهُ مَثَلاً لِّلَّذِينَ كَفَرُواْ امْرَأَتَ نُوحٍ وَامْرَأَتَ لُوطٍ كَانَتَا تَحْتَ عَبْدَيْنِ مِنْ عِبَادِنَا صَـلِحَيْنِ فَخَانَتَاهُمَا فَلَمْ يُغْنِينَا عَنْهُمَا مِنَ اللَّهِ شَيْئاً وَقِيلَ ادْخُلاَ النَّارَ مَعَ الدَخِلِينَ
And Allah presents an example of those who believed: the wife of Pharaoh, when she said, "My Lord, build for me near You a house in Paradise and save me from Pharaoh and his deeds and save me from the wrongdoing people." (66:11)
﴿وَضَرَبَ اللَّهُ مَثَلاً لّلَّذِينَ ءامَنُواْ امْرَأَتَ فِرْعَوْنَ إِذْ قَالَتْ رَبّ ابْنِ لِى عِندَكَ بَيْتاً فِى الْجَنَّةِ وَنَجّنِى مِن فِرْعَوْنَ وَعَمَلِهِ وَنَجّنِى مِنَ الْقَوْمِ الظَّـلِمِينَ
and in other occasions it is referred to as zawj(u) زوج (which often is translated as mate instead of wife) like in:
So We responded to him, and We gave to him John, and amended for him his wife. Indeed, they used to hasten to good deeds and supplicate Us in hope and fear, and they were to Us humbly submissive. (21:90)
فَاسْتَجَبْنَا لَهُ وَوَهَبْنَا لَهُ يَحْيَى وَأَصْلَحْنَا لَهُ زَوْجَهُ إِنَّهُمْ كَانُواْ يُسَارِعُونَ فِى الْخَيْرَتِ وَيَدْعُونَنَا رَغَباً وَرَهَباً وَكَانُواْ لَنَا خـشِعِينَ
And [remember, O Muhammad], when you said to the one on whom Allah bestowed favor and you bestowed favor, "Keep your wife and fear Allah ," ... (33:37)
وَإِذْ تَقُولُ لِلَّذِى أَنعَمَ اللَّهُ عَلَيْهِ وَأَنْعَمْتَ عَلَيْهِ أَمْسِكْ عَلَيْكَ زَوْجَكَ وَاتَّقِ اللَّهَ ...
Referring here to Zayd ibn Haritah as the husband.
I wonder if there's a special significance in the use of These synonyms and like to learn/share it with a good explanation!