rattler vs liner train

rattler and liner train both are nouns.

Word	Noun	Adjective	Verb	Adverb
rattler	Yes	No	No	No
liner train	Yes	No	No	No

As nouns, liner train is a hyponym of rattler; that is, liner train is a word with a more specific, narrower meaning than rattler:

rattler: a railroad train consisting of freight cars
liner train: a long-distance express freight train between industrial centers and seaports with facilities for rapid loading and unloading of goods

Other hyponyms of rattler include freight liner.

rattler (noun)	liner train (noun)
pit viper with horny segments at the end of the tail that rattle when shaken	a long-distance express freight train between industrial centers and seaports with facilities for rapid loading and unloading of goods
a railroad train consisting of freight cars