"On the face of it" is a phrase that is often used to indicate the appearance or the first impression of something or someone. However, there are several synonyms that can be used interchangeably to convey a similar meaning, such as "at first glance," "apparently," "seemingly," "initially," "outwardly," "primarily," and "ostensibly." These synonyms indicate the surface or the observable aspects of a situation or a person, without delving into the deeper underlying meaning or implications. Using these synonyms can help to add variety to one's language and convey a more nuanced understanding of a situation.