Answer:
石+正+木 SEKI, SHAKU, ishi - stone / SEI, SHOU, tada(shii), masa(ni) - correct, just, exact / MOKU, BOKU, ki - tree
大+口 DAI, oo(kii) - big / KOU, kuchi - mouth
ケ+コ+十+二 Katakana "Ke" / Katakana "Ko" / JUU, tou, to - ten / NI, futa(tsu), futa - two
キ+ト+土 DO, tsuchi - earth, soil
夫+日 FU, FUU, otto - husband / NICHI, JITSU, hi, ka - sun, day
They all make another character if the same radical is used more than once.
礎 SO, ishizue - cornerstone, foundation
器 KI, utsuwa - vessel, container, apparatus
筆 HITSU, fude - writing brush
掛 ka(karu), ka(keru) - hang, cost, take, multiply, put on
替 TAI, ka(eru), ka(waru)