turquoise vs peacock blue

turquoise and peacock blue both are nouns.

Word	Noun	Adjective	Verb	Adverb
turquoise	Yes	No	No	No
peacock blue	Yes	No	No	No

As nouns, turquoise and peacock blue are synonyms defined as:

Other synonyms of turquoise include aqua, aquamarine, cobalt blue, greenish blue.

turquoise (noun)	peacock blue (noun)
a shade of blue tinged with green	a shade of blue tinged with green
a blue to grey green mineral consisting of copper aluminum phosphate