underexposure vs exposure

underexposure and exposure both are nouns.

Word	Noun	Adjective	Verb	Adverb
underexposure	Yes	No	No	No
exposure	Yes	No	No	No

As nouns, exposure is a hypernym of underexposure; that is, exposure is a word with a broader meaning than underexposure:

underexposure: the act of exposing film to too little light or for too short a time
exposure: the act of exposing film to light

As nouns, exposure is a hypernym of underexposure; that is, exposure is a word with a broader meaning than underexposure:

underexposure (noun)	exposure (noun)
the act of exposing film to too little light or for too short a time	abandoning without shelter or protection (as by leaving an infant out in the open)
inadequate publicity	the act of exposing film to light
	presentation to view in an open or public manner
	the act of subjecting someone to an influencing experience
	a representation of a person or scene in the form of a print or transparent slide or in digital format
	vulnerability to the elements; to the action of heat or cold or wind or rain
	aspect resulting from the direction a building or window faces
	the disclosure of something secret
	the intensity of light falling on a photographic film or plate
	the state of being vulnerable or exposed