MOT vs trial

MOT and trial both are nouns.

Word	Noun	Adjective	Verb	Adverb
MOT	Yes	No	No	No
trial	Yes	No	No	No

As nouns, trial is a hypernym of MOT; that is, trial is a word with a broader meaning than MOT:

MOT: a compulsory annual test of older motor vehicles for safety and exhaust fumes
trial: the act of testing something

Other hypernyms of MOT include run, test.

MOT (noun)	trial (noun)
a compulsory annual test of older motor vehicles for safety and exhaust fumes	the act of testing something
	(law) the determination of a person's innocence or guilt by due process of law
	the act of undergoing testing
	trying something to find out about it
	an annoying or frustrating or catastrophic event
	(sports) a preliminary competition to determine qualifications