agoraphobia vs phobic disorder

agoraphobia and phobic disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
agoraphobia	Yes	No	No	No
phobic disorder	Yes	No	No	No

As nouns, phobic disorder is a hypernym of agoraphobia; that is, phobic disorder is a word with a broader meaning than agoraphobia:

agoraphobia: a morbid fear of open spaces (as fear of being caught alone in some public place)
phobic disorder: an anxiety disorder characterized by extreme and irrational fear of simple things or social situations

Other hypernyms of agoraphobia include phobia, phobic neurosis.

agoraphobia (noun)	phobic disorder (noun)
a morbid fear of open spaces (as fear of being caught alone in some public place)	an anxiety disorder characterized by extreme and irrational fear of simple things or social situations