straggler vs trailer

straggler and trailer both are nouns.

Word	Noun	Adjective	Verb	Adverb
straggler	Yes	No	No	No
trailer	Yes	No	No	No

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

straggler: someone who strays or falls behind
trailer: someone who takes more time than necessary; someone who lags behind

Other hypernyms of straggler include dawdler, drone, laggard, lagger, poke.

straggler (noun)	trailer (noun)
someone who strays or falls behind	a wheeled vehicle that can be pulled by a car or truck and is equipped for occupancy
	a large transport conveyance designed to be pulled by a truck or tractor
	an advertisement consisting of short scenes from a motion picture that will appear in the near future
	someone who takes more time than necessary; someone who lags behind