doll's house vs dollhouse

doll's house and dollhouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
doll's house	Yes	No	No	No
dollhouse	Yes	No	No	No

As nouns, doll's house and dollhouse are synonyms defined as:

doll's house and dollhouse: a small model of a house used as a toy by children

As nouns, doll's house and dollhouse are synonyms defined as:

doll's house and dollhouse: a house so small that it is likened to a child's plaything

doll's house (noun)	dollhouse (noun)
a small model of a house used as a toy by children	a small model of a house used as a toy by children
a house so small that it is likened to a child's plaything	a house so small that it is likened to a child's plaything