Answer: hazmat

AnswerCrossword Clue
HAZMAT

Suit portmanteau

HAZMAT

Stuff that might be banned in the HOV lane

HAZMAT

Freight not permitted in some tunnels, familiarly

HAZMAT
Trucking specialty
HAZMAT
Stuff often covered with diamonds
HAZMATDangerous cargo
HAZMATDangerous cargo, for short
HAZMATFrightful freight, for short
HAZMATDangerous cargo, in modern lingo
HAZMATEcological disaster team
HAZMATDangerous stuff, to the DOT