time exposure vs photo

time exposure and photo both are nouns.

Word	Noun	Adjective	Verb	Adverb
time exposure	Yes	No	No	No
photo	Yes	No	No	No

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

time exposure: a photograph produced with a relatively long exposure time
photo: a representation of a person or scene in the form of a print or transparent slide or in digital format

Other hypernyms of time exposure include exposure, photograph, pic, picture.

time exposure (noun)	photo (noun)
exposure of a film for a relatively long time (more than half a second)	a representation of a person or scene in the form of a print or transparent slide or in digital format
a photograph produced with a relatively long exposure time