quadrilateral¹/kwodriʹlat(ə)rəl/ noun

quadrilateral²adj

• borderer
• borderland
• border line
• borderline
• bordure
• bore
• Boreal
• boredom
• borehole
• borer
• bore/scare the pants off somebody
• boric
• boric acid
• boride
• boring
• borlotti bean
• born
• born-again
• born and bred
• borne
• Bornean
• bornite
• born on the wrong side of the blanket
• boron
• boronia