The phrase "be wanting" is often used to describe a lack or deficiency in something or someone. There are several synonyms that can be used to replace this phrase, including inadequate, insufficient, lacking, deficient, and incomplete. These words all convey a similar meaning of something that is not up to standard or falling short. Other synonyms for "be wanting" include deficient, imperfect, flawed, and unfinished. Whether you're describing a product, service, or individual, using synonyms for "be wanting" can add depth and specificity to your language. It can also help to convey a clearer picture of the shortcomings of someone or something.