Un-earthlinesses is a unique and uncommon word that can be difficult to replace with synonyms. However, some words that can be used in its place to convey a similar meaning include otherworldliness, ethereality, surrealism, ghostliness, and dreaminess. These words all suggest an element of displacement from reality, detachment, or a sense of being out of place. Un-earthlinesses may be used to describe something that is strange, mysterious, or bizarre, and these synonyms can similarly be used to convey that sense of unfamiliarity or otherness. When looking for an alternative to un-earthlinesses, it is important to consider the specific context and connotations being conveyed.