articulated lorry vs tractor trailer

articulated lorry and tractor trailer both are nouns.

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

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

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

Other synonyms of articulated lorry include rig, semi, trailer truck, trucking rig.

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