Answer:
日+土+ノ NICHI, JITSU, hi, ka - sun, day / DO, tsuchi - earth, soil / Katakana "No"
木+月 MOKU, BOKU, ki - tree / GETSU, tsuki, GATSU - moon, month
ケ+由 Katakana "Ke" / YUU, YU, YUI, yoshi - reason, cause
言+八+一+⺕+｜ GEN, GON, i(u), koto - say, speech / HACHI, ya(ttsu), ya(tsu), ya, yo - eight / ICHI, ITSU, hito(tsu) - one / ⺕ The "Keigashira" raical - pig's head / Vertical line
ツ+⼍+ノ Katakana "Tsu" / The "Wakanmuri" radical - cover / Katakana "No"
They all make another character if the same radical is used more than once.
暑 SHO, atsu(i) - hot (weather)
棚 tana - shelf
笛 TEKI, fue - flute, whistle
謙 KEN - modesty, humility
営 EI, itona(mu) - perform, conduct business