Letters that make three-cornered
o, d, e, n, c, h, r, t are letters that make 'three-cornered'
Words within three-cornered
corner, ER, OR, corn, re, RN, Red, ED, EE, red, cornered, three, CO, NE, Re, Co, Er, Ne, Rn, Th, hr are words within 'three-cornered'