tractor trailer vs articulated lorry

tractor trailer and articulated lorry both are nouns.

Word	Noun	Adjective	Verb	Adverb
tractor trailer	Yes	No	No	No
articulated lorry	Yes	No	No	No

As nouns, tractor trailer and articulated lorry are synonyms defined as:

tractor trailer and articulated lorry: a truck consisting of a tractor and trailer together

Other synonyms of tractor trailer include rig, semi, trailer truck, trucking rig.

tractor trailer (noun)	articulated lorry (noun)
a truck consisting of a tractor and trailer together	a truck consisting of a tractor and trailer together