wendy house vs playhouse

wendy house and playhouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
wendy house	Yes	No	No	No
playhouse	Yes	No	No	No

As nouns, wendy house and playhouse are synonyms defined as:

wendy house and playhouse: plaything consisting of a small model of a house that children can play inside of

wendy house (noun)	playhouse (noun)
plaything consisting of a small model of a house that children can play inside of	plaything consisting of a small model of a house that children can play inside of