knickknackery vs oddment

knickknackery and oddment both are nouns.

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

As nouns, oddment is a hypernym of knickknackery; that is, oddment is a word with a broader meaning than knickknackery:

Other hypernyms of knickknackery include curio, curiosity, oddity, peculiarity, rarity.

knickknackery (noun)	oddment (noun)
miscellaneous curios	a piece of cloth that is left over after the rest has been used or sold
	something unusual -- perhaps worthy of collecting