Angustirostrate is a rare word, which means narrow-beaked or having a long, slender beak. It is often used in ornithology to describe the shape of a bird's beak. However, there are several synonyms for this word that can be used interchangeably. Some of the synonyms for angustirostrate are acuminated, acuminate, acute, pointy, and slender. These words describe the same characteristic of having a narrow and pointed shape, but with different intensities. By using synonyms, a writer can add variety to their language and make their writing more interesting. They can also avoid repeating the same word, making their writing more pleasant to read.