objective vs subjective

objective is a noun but subjective is not a noun.

Word	Noun	Adjective	Verb	Adverb
objective	Yes	Yes	No	No
subjective	No	Yes	No	No

objective (noun)	subjective (noun)
the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
the goal intended to be attained (and which is believed to be attainable)

objective (adjective)	subjective (adjective)
undistorted by emotion or personal bias; based on observable phenomena	taking place within the mind and modified by individual bias
serving as or indicating the object of a verb or of certain prepositions and used for certain other purposes	of a mental act performed entirely within the mind
belonging to immediate experience of actual things or events
emphasizing or expressing things as perceived without distortion of personal feelings or interpretation