heather vs heather mixture

heather and heather mixture both are nouns.

Word	Noun	Adjective	Verb	Adverb
heather	Yes	No	No	No
heather mixture	Yes	No	No	No

As nouns, heather and heather mixture are synonyms defined as:

heather and heather mixture: interwoven yarns of mixed colors producing muted greyish shades with flecks of color

heather (noun)	heather mixture (noun)
interwoven yarns of mixed colors producing muted greyish shades with flecks of color	interwoven yarns of mixed colors producing muted greyish shades with flecks of color
common Old World heath represented by many varieties; low evergreen grown widely in the Northern Hemisphere