explosive
noun
a chemical substance that undergoes a rapid chemical change (with the production of gas) on being heated or struck
adjective
serving to explode or characterized by explosion or sudden outburst
“an explosive device”
“explosive gas”
Oppositesnonexplosiveliable to lead to sudden change or violence
“an explosive issue”
“a volatile situation with troops and rioters eager for a confrontation”
Synonymsvolatilesudden and loud
“an explosive laugh”
Source: WordNet 3.1, Princeton University