Relationship

Family relation

Father -- पिता (pitaa) or much less formally बाप (baap)
Mother -- माता (maataa) or less formally माँ (ma.N)
                                                      Paternal Grandfather -- दादा (daadaa)
                                                      Paternal Grandmother -- दादी (daadi)
                                                      Maternal Grandfather -- नाना (naanaa)
                                                      Maternal Grandmother -- नानी (naanii)
                                                      Brother -- भाई bhaii
Brother's wife -- भाभी (bhabhi-ji) *Northern Punjab customs address only the Older Brother's wife as "Bhabhi" i.e. "Virender Bhaiyaa's wife, Kamlesh Bhabhi, as opposed to chotaa bhai Vind's wife, Poonam". *Northern Punjabi customs also (by district) refrain from addressing a second wife as "Bhabhi" i.e. "Virender Bhaiyaa's second wife, Artee", as for religious purposes, second marriages are not permitted to take place before Agni - the sacred fire.
Elder Brother -- भैया (bhaiyaa) or दादा (daadaa) or (bhaisahib)
Younger Brother -- छोटा भाई (Chota bhaii)
Sister -- बहिन (bahin) or बहन (behen)
Sister's husband -- बहनोई (bahanoii, also jija)
Elder Sister -- दीदी (diidii) or जीजी (jiijii) or (behen-ji)
Younger Sister -- छोटी बहिन (Choti behen)
Son -- बेटा (beTa) or पुत्र (putra)
Daughter -- बेटी (beTii) or पुत्री (putrii)
Daughter's husband (son-in-law) -- दामाद (daamaad, also jamaii)
Grandson (son's son) -- पोता (potaa)
Granddaughter (son's daughter) -- पोती (potii)
Grandson (daughter's son) -- नाती (naatii) or नवासा (navaasaa)
Granddaughter (daughter's daughter) -- नातिन (naatin) or नवासी (navaasii)
Husband -- पति (pati)
Wife -- पत्नी (patnii)

Aunts and Uncles

Father's older brother (uncle) -- ताऊ (taauu) or ताया (taya)
Father's older brother's wife (aunt) -- ताई (tai)
Father's younger brother (uncle) -- चाचाj (chacha)
Father's younger brother's wife (aunt) -- चाची (chachiji)
Father's sister (aunt) -- बुआ (bua) or फूफी (phuuphii)
Father's sister's husband फूफा (phupha)
Mother's brother -- मामा (mama) or मामू (mamu)
Mother's brother's wife -- मामी (mami) or माई (mai)
Mother's sister -- मौसी (mausii) or ख़ाला (khala)
Mother's sister husband -- मौसा (massad)
Brother's son (nephew) -- भतीजा (bhatijaa)
Brother's daughter (niece) -- भतीजी (bhatiiji)
Husband's elder brother's daughter (jitotee) -- jitotee (jitotee)
Husband's elder brother's son (jitot) -- jitot (jitot)
Sister's son (nephew) -- भान्जा (bhanja)
Sister's daughter (niece) -- भान्जी (bhanji)
Elder brothers wife -- (bhabhi)
younger brothers wife -- (bahu),bhayo.
wife's sister -- (saali)
wife's brother -- (saala)
Fianceé ---मंगेतर -- (mangéthar)

Friends

Friend -- मित्र (mitra) or दोस्त (dost)
Companion -- saathi
Female friend of a female -- सहेली (sahelii)
Neighbour -- पड़ोसी (pa.dhosii) or हमसाया (hamsaayaa)
Female neighbour -- पड़ोसिन (pa.dhosin)
Traveling companion -- हमसफ़र humsafar
Pal, buddy, friend -- यार yaar

Teachers and Students

Teacher -- गुरु (guru) or अध्यापक (adhyaapak)
Teacher (A female teacher) -- अध्यापिका (adhyaapikaa)
Headmaster -- हेडमास्टर (hedmaasTar) or प्रधानाचार्य (pradhaanaachaarya)
Student -- kaluti (Chaatr) or विद्यार्थी (vidyaarthii)
Graduate -- स्नातक (snaatak)