I didn't see a duplicate for this in the similar questions, so here goes. Is there either a list of words like this, or a name for this type of word (made of two very rare/complex kanji, but the word itself is fairly common)?
These are the ones I have so far, for reference:
癇癪{かんしゃく}
躊躇{ちゅうちょ}
顰蹙{ひんしゅく}
These two are just plant/mineral names, but are also somewhat common/Jouyou kanji:
薔薇{バラ}
瑠璃{ルリ}