creosote vs coal-tar creosote

creosote and coal-tar creosote both are nouns.

Word	Noun	Adjective	Verb	Adverb
creosote	Yes	No	Yes	No
coal-tar creosote	Yes	No	No	No

As nouns, creosote and coal-tar creosote are synonyms defined as:

creosote and coal-tar creosote: a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood

creosote (noun)	coal-tar creosote (noun)
a colorless or yellowish oily liquid obtained by distillation of wood tar; used as an antiseptic	a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood
a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood

creosote (verb)	coal-tar creosote (verb)
treat with creosote