Dropwort and Spirea

Spirea and dropwort are semantically related. In some cases you can use "Spirea" instead a noun "Dropwort".

Spirea noun - A Japanese shrub that resembles members of the genus Spiraea; widely cultivated in many varieties for its dense panicles of flowers in many colors; often forced by florists for Easter blooming.

Dropwort and spirea are semantically related. You can use "Dropwort" instead a noun "Spirea".