dumper vs tipper lorry

dumper and tipper lorry both are nouns.

Word	Noun	Adjective	Verb	Adverb
dumper	Yes	No	No	No
tipper lorry	Yes	No	No	No

As nouns, dumper and tipper lorry are synonyms defined as:

dumper and tipper lorry: truck whose contents can be emptied without handling; the front end of the platform can be pneumatically raised so that the load is discharged by gravity

Other synonyms of dumper include dump truck, tip truck, tipper, tipper truck.

dumper (noun)	tipper lorry (noun)
truck whose contents can be emptied without handling; the front end of the platform can be pneumatically raised so that the load is discharged by gravity	truck whose contents can be emptied without handling; the front end of the platform can be pneumatically raised so that the load is discharged by gravity