maglev vs rail technology

maglev and rail technology both are nouns.

Word	Noun	Adjective	Verb	Adverb
maglev	Yes	No	No	No
rail technology	Yes	No	No	No

As nouns, rail technology is a hypernym of maglev; that is, rail technology is a word with a broader meaning than maglev:

maglev: high-speed rail technology; train is suspended on a magnetic cushion above a magnetized track and so travels free of friction
rail technology: the activity of designing and constructing and operating railroads

Other hypernyms of maglev include railroading.

maglev (noun)	rail technology (noun)
high-speed rail technology; train is suspended on a magnetic cushion above a magnetized track and so travels free of friction	the activity of designing and constructing and operating railroads