Answer: flatcars

AnswerCrossword Clue
FLATCARSSome train units
FLATCARSFreight components
FLATCARSFreight train components
FLATCARSFreight carriers
FLATCARSVagabonds' transportation, maybe
flatcarsFLATCAR, a railway car without sides or roof
flatcarsA railroad freight car without a roof or sides