weekly vs serial

weekly and serial both are nouns.

Word	Noun	Adjective	Verb	Adverb
weekly	Yes	Yes	No	Yes
serial	Yes	Yes	No	No

As nouns, serial is a hypernym of weekly; that is, serial is a word with a broader meaning than weekly:

Other hypernyms of weekly include serial publication, series.

weekly (noun)	serial (noun)
a periodical that is published every week (or 52 issues per year)	a serialized set of programs
	a periodical that appears at scheduled times

weekly (adjective)	serial (adjective)
of or occurring every seven days	pertaining to or occurring in or producing a series
	pertaining to or composed in serial technique
	of or relating to the sequential performance of multiple operations
	in regular succession without gaps

weekly (adverb)	serial (adverb)
without missing a week