semi vs articulated lorry

semi and articulated lorry both are nouns.

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

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

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

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

semi (noun)	articulated lorry (noun)
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
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