The crossword solutions for the term 'Gorilla or Orangutan' are 'APE'. Gorillas and orangutans are two of the four species of great apes, which also include chimpanzees and bonobos. They are the largest living primates and are native to Africa and Southeast Asia, respectively. Gorillas are ground-dwelling herbivores that live in family groups, while orangutans are arboreal and mainly solitary. Both species are endangered due to habitat destruction and illegal hunting.