Answer: zeppelins

AnswerCrossword Clue
ZEPPELINSBig hydrogen users
ZEPPELINSEarly German fliers
ZEPPELINSObsolete aircraft.
ZEPPELINSRigid airships
ZEPPELINSAirships
ZEPPELINSMeans of some W.W. I raids
zeppelinsZEPPELIN, a cigar-shaped airship