tandem trailer vs rig

tandem trailer and rig both are nouns.

Word	Noun	Adjective	Verb	Adverb
tandem trailer	Yes	No	No	No
rig	Yes	No	Yes	No

As nouns, rig is a hypernym of tandem trailer; that is, rig is a word with a broader meaning than tandem trailer:

Other hypernyms of tandem trailer include articulated lorry, semi, tractor trailer, trailer truck, trucking rig.

tandem trailer (noun)	rig (noun)
trucking rig with two trailers in tandem	the act of swindling by some fraudulent scheme
	gear (including necessary machinery) for a particular enterprise
	formation of masts, spars, sails, etc., on a vessel
	a set of clothing (with accessories)
	a vehicle with wheels drawn by one or more horses
	a truck consisting of a tractor and trailer together
	gear used in fishing

tandem trailer (verb)	rig (verb)
	equip with sails or masts
	connect or secure to
	manipulate in a fraudulent manner
	arrange the outcome of by means of deceit