dog's-tooth violet vs dogtooth

dog's-tooth violet and dogtooth both are nouns.

Word	Noun	Adjective	Verb	Adverb
dog's-tooth violet	Yes	No	No	No
dogtooth	Yes	No	No	No

As nouns, dog's-tooth violet and dogtooth are synonyms defined as:

dog's-tooth violet and dogtooth: perennial woodland spring-flowering plant; widely cultivated

Other synonyms of dog's-tooth violet include dogtooth violet.

dog's-tooth violet (noun)	dogtooth (noun)
perennial woodland spring-flowering plant; widely cultivated	a carved pyramidal ornament; used in 13th century England
	one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars
	perennial woodland spring-flowering plant; widely cultivated