Answer:
⾫+日+ヨ The "furutori" radical - small bird / NICHI, JITSU, hi, ka - sun, day / Katakana "Yo"
ヒ+ム+月 Katakan "Hi" / Katakana "Mu" / GETSU, tsuki, GATSU - moon, month
ケ+合 Katakana "Ke" / GOU, GA, a(u) - meet
日+立 NICHI, JITSU, hi, ka - sun, day / RITSU, RYUU, ta(tsu), ta(teru) - stand
可+欠 KA - good, possible, approval / KETSU, ka(ku), ka(keru) - lack
They all make another character if the same radical is used more than once.
曜 YOU - weekday
能 NOU - ability, function, Noh theatre
答 TOU, kotae - answer
暗 AN, kura(i) - dark
歌 KA, uta(u), uta - song, sing, poem