Word

あけ、ひ
scarlet; red; blood
Word

紅、朱、緋
あか
red; crimson; scarlet; red-containing colour (e.g. brown, pink, orange); Red (i.e. communist); red light; red ink (i.e. in finance or proof-reading); (in) the red; complete; total; perfect; obvious; copper
Word

しゅ
cinnabar; vermillion; red; slightly-orange red; red pigment (and ink made from same); red text (as used to correct documents)
Word

朱雀

すざく、すじゃく、しゅじゃく
Vermilion Bird (god said to rule over the southern heavens); seven mansions (Chinese constellations) of the southern heavens
Word

朱印

しゅいん
red seal
Word

朱子学

しゅしがく
neo-Confucianism (based on the teachings of Zhu Xi and his followers)
Word

朱色

しゅいろ
vermilion; scarlet
Word

朱鷺、桃花鳥
とき、しゅろ、つき、トキ
Japanese crested ibis (Nipponia nippon); crested ibis
Word

丹朱

たんしゅ
cinnabar; vermilion
Word

御朱印

ご朱印
ごしゅいん
letter bearing the shogun's scarlet seal