Answer:
名 MEI, MYOU, na - name
半 HAN, naka(ba) - half
安 AN, yasu(i) - peace, cheap
工 KOU, KU - artisan, skill, work
阪 HAN, saka - slope
All take "大 - big” in front to make a word, but only 阪 uses the "Oo" reading (Oo-saka); the others are all "Tai/Dai-".
大名 DAIMYOU - a lord
大半 TAIHAN - majority
大安 DAIAN - ancient Chinese weekday
大工 DAIKU - carpenter
大阪 OOSAKA - a city in western Japan