ambiguous vs psychological science

ambiguous is not a noun while psychological science is a noun.

Word	Noun	Adjective	Verb	Adverb
ambiguous	No	Yes	No	No
psychological science	Yes	No	No	No

ambiguous (noun)	psychological science (noun)
	the science of mental life

ambiguous (adjective)	psychological science (adjective)
having more than one possible meaning
open to two or more interpretations; or of uncertain nature or significance; or (often) intended to mislead
having no intrinsic or objective meaning; not organized in conventional patterns