articulated lorry vs semi

articulated lorry and semi both are nouns.

Word	Noun	Adjective	Verb	Adverb
articulated lorry	Yes	No	No	No
semi	Yes	No	No	No

As nouns, articulated lorry and semi are synonyms defined as:

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

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

articulated lorry (noun)	semi (noun)
a truck consisting of a tractor and trailer together	a trailer having wheels only in the rear; the front is supported by the towing vehicle
	a truck consisting of a tractor and trailer together
	one of the two competitions in the next to the last round of an elimination tournament