wave train vs series

wave train and series both are nouns.

Word	Noun	Adjective	Verb	Adverb
wave train	Yes	No	No	No
series	Yes	No	No	No

As nouns, series is a hypernym of wave train; that is, series is a word with a broader meaning than wave train:

wave train (noun)	series (noun)
a succession of waves spaced at regular intervals	(mathematics) the sum of a finite or infinite sequence of expressions
	a periodical that appears at scheduled times
	a serialized set of programs
	(sports) several contests played successively by the same teams
	similar things placed in order or happening one after another
	a group of postage stamps having a common theme or a group of coins or currency selected as a group for study or collection
	(electronics) connection of components in such a manner that current flows first through one and then through the other