slogan vs catchword

slogan and catchword both are nouns.

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

As nouns, slogan and catchword are synonyms defined as:

slogan and catchword: a favorite saying of a group, organization or individual

Other synonyms of slogan include motto, shibboleth.

slogan (noun)	catchword (noun)
a favorite saying of a group, organization or individual	a favorite saying of a group, organization or individual
	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