Rear aloft is a phrase that describes something being lifted or raised up high in the air or on top of something else. Synonyms for this phrase could include raised high, elevated, lifted aloft, hoisted, or perched up high. Additionally, other descriptive words that could be used to convey a similar meaning might include towering, soaring, lofty, or high-reaching. These synonyms could be used in a variety of contexts, such as describing a tall building, a large bird flying overhead, or a flag fluttering in the breeze atop a pole. Overall, there are many different words and phrases that can be used to describe objects or beings that are raised up high in the air, depending on the specific context and connotations desired.