apprehend vs fear

apprehend is not a noun while fear is a noun.

Word	Noun	Adjective	Verb	Adverb
apprehend	No	No	Yes	No
fear	Yes	No	Yes	No

apprehend (noun)	fear (noun)
	an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight)
	an anxious feeling
	a feeling of profound respect for someone or something

apprehend (verb)	fear (verb)
get the meaning of something	be afraid or scared of; be frightened of
take into custody	regard with feelings of respect and reverence; consider hallowed or exalted or be in awe of
anticipate with dread or anxiety	be sorry; used to introduce an unpleasant statement
	be afraid or feel anxious or apprehensive about a possible or probable situation or event
	be uneasy or apprehensive about