1. Can emit sparks or burst into flame

See also: combustible

• Oaxaca
• Oaxaca de Juarez
• Ob
• Ob River
• ob-gyn
• Obadiah
• Obama
• obbligato
• obconic
• obconical
• obcordate
• obduracy
• obdurate
• obdurately
• OBE
• obeah
• obeche
• obechi
• obedience
• obedience plant
• obedient
• obedient plant
• obediently
• obeisance
• obeisant