catchword vs mantra

catchword and mantra both are nouns.

Word	Noun	Adjective	Verb	Adverb
catchword	Yes	No	No	No
mantra	Yes	No	No	No

As nouns, mantra is a hyponym of catchword; that is, mantra is a word with a more specific, narrower meaning than catchword:

Other hyponyms of catchword include catch phrase, catchphrase, battle cry, cry, rallying cry, war cry, watchword.

catchword (noun)	mantra (noun)
a favorite saying of a group, organization or individual	(Sanskrit) literally a `sacred utterance' in Vedism; one of a collection of orally transmitted poetic hymns
a word printed at the top of the page of a dictionary or other reference book to indicate the first or last item on that page	a commonly repeated word or phrase