IPA: //ˌfoʊtəˈmɒn.tɑːʒ//
KK: /ˈfoʊtoʊˌmɒn.tɑːʒ/
A type of artwork created by combining different photographs and images into one picture.
The artist created a stunning photomontage that captured the essence of the city.
Photomontage → It is formed from "photo-" (from Greek "phōtos", meaning light) and "montage" (from French "monter", meaning to assemble or put together). The word refers to a technique of assembling various photographs into a single composition using light.
Think of 'light' ('photo-') being used to 'assemble' ('montage') different images together — that's what a photomontage is.
No commonly confused words.