playground vs teeter

playground and teeter both are nouns.

Word	Noun	Adjective	Verb	Adverb
playground	Yes	No	No	No
teeter	Yes	No	Yes	No

playground (noun)	teeter (noun)
yard consisting of an outdoor area for children's play	a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end
an area where many people go for recreation, holidays or other purposes

playground (verb)	teeter (verb)
	move unsteadily, with a rocking motion