Two words, replace one

[Linds]

Tree house

 

[Aria]

Tree bark

 

[Bat]

Dog bark

 

[Aria]

Dog collar

 

[Bat]

Dog park

 

[Aria]

Grassy park

 

[Bat]

Grassy hills

 

[Aria]

Grassy garden

 

[Bat]

Beautiful garden

 

[Aria]

Secret garden

 

[Lilian]

secret room

 

[Bat]

Dark room

 

[Tina]

Dark followers

 

[Bat]

Dark magic

 

[Tina]

Harmless magic

 

[Bat]

Harmless creature

 

[Tina]

Dangerous creature

 

[Bat]

Dangerous environment

 

[Maggie]

Clean environment

 

[Bat]

Clean room