turquoise vs aqua

turquoise and aqua both are nouns.

Word	Noun	Adjective	Verb	Adverb
turquoise	Yes	No	No	No
aqua	Yes	No	No	No

As nouns, turquoise and aqua are synonyms defined as:

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

turquoise (noun)	aqua (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