explosive

(noun) a chemical substance that undergoes a rapid chemical change (with the production of gas) on being heated or struck.

(adj) serving to explode or characterized by explosion or sudden outburst. Synonyms: explosive (vs. nonexplosive). Examples: "An explosive device." "Explosive gas." "Explosive force." "Explosive violence." "An explosive temper."

(adj) liable to lead to sudden change or violence. Synonyms: volatile. Examples: "An explosive issue." "A volatile situation with troops and rioters eager for a confrontation."

(adj) sudden and loud. Example: "An explosive laugh."