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Discover LudwigSuggestions(5)
The phrase "are believed to exist" is correct and usable in written English.
It can be used when discussing theories, hypotheses, or beliefs about the existence of something that has not been definitively proven.
Example: "Many species of deep-sea creatures are believed to exist in the unexplored depths of the ocean."
Alternatives: "are thought to exist" or "are considered to exist".
Exact(38)
Fewer than 100 copies are believed to exist.
Indeed only around 15 genuine Da Vinci works are believed to exist today.
Psychopaths are as old as Cain, and they are believed to exist in all cultures, although they are more prevalent in individualistic societies in the West.
With the help of foreign companies, the Kurdish regional government has been preparing to exploit the huge oil reserves that are believed to exist there.
Only 200 are believed to exist today, and beginning on Friday at the Brooklyn Museum of Art, 58 of the finest will be reunited for the first time since the 18th century.
A complete skeleton was found in a field discovered by a farm worker last year, where up to seven such complete skeletons are believed to exist, in the locality of El Sombrero.
Similar(21)
The result is that a complete run of Coronation Street is believed to exist.
A global liquid ocean is believed to exist beneath the frozen crust of the moon, which is 300m (500km) wide.
In 1567 the former set out from Peru to discover the great southern continent that was believed to exist in the South Pacific.
The God of monotheism is the one real god that is believed to exist or, in any case, that is acknowledged as such.
A lack of resources spared the region major confrontations with colonialism (by contrast, among the Ngoni led by Mpeseni, where gold was believed to exist, the onslaught was as dramatic as in Zimbabwe and the expropriation as brutal).
More suggestions(18)
are suggested to exist
are believed to arise
are felt to exist
are acknowledged to exist
are thought to exist
are considered to exist
are expected to exist
are speculated to exist
are assumed to exist
are perceived to exist
are believed to establish
are believed to happen
are proved to exist
are believed to emerge
are supposed to exist
are inferred to exist
are believed to act
are believed to reside
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com