Answer:
官 KAN - government, authorities
便 BIN, BEN, tayo(ri) - convenience, excrement, news
使 SHI, tsuka(u) - messenger, use
所 SHO, tokoro - place
豆 TOU, ZU, mame - bean, pea
All take 大 (DAI, oo(kii) - big) in front to make a word, but only 所 uses the "Oo" reading (OoTokoro); the others are all "Tai/Dai-":
大官 Daikan - senior official
大便 Daiben - excrement
大使 Taishi - ambassador
大所 Oodokoro - a mansion
大豆 Daizu - Soybean