knickknackery vs knickknack

knickknackery and knickknack both are nouns.

Word	Noun	Adjective	Verb	Adverb
knickknackery	Yes	No	No	No
knickknack	Yes	No	No	No

As nouns, knickknackery and knickknack are synonyms defined as:

Other synonyms of knickknackery include bric-a-brac, nicknack, whatnot.

knickknackery (noun)	knickknack (noun)
miscellaneous curios	miscellaneous curios
	a small inexpensive mass-produced article