Long forgotten
Old and long forgotten are semantically related. In some cases you can use "Old" instead an adjective phrase "Long forgotten".
Old
Old adjective - Being of advanced years and especially past middle age.
Long forgotten and old are semantically related. You can use "Long forgotten" instead an adjective "Old".
Mutual synonyms
Both terms in one sentence
- Captain John Armstrong Brannigan in the Revelation Space trilogy was implied to be very old courtesy of his cybernetic implants, but it's not till the second novel, when a character finds an old helmet with the NASA logo - now long forgotten six hundred years later - that points out his true age.
Source: Exposition of Immortality -
Devola, who sings it around the village, says that it's in a language that has been long forgotten otherwise and no one knows what the lyrics actually mean, since the song is so old.
Source: As Long as It Sounds Foreign -
Old Father Tree was summoned into the world in a time long forgotten to act as the can for a particularly nasty Sealed Evil in a Can.
Source: Physical God
Cite this Source
Old and Long forgotten. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/long_forgotten/old
Long forgotten & Old. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/long_forgotten/old>.
Old or Long forgotten. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/long_forgotten/old.
Google Ngram Viewer shows how "long forgotten" and "old" have occurred on timeline