Acquaintable, a term rarely heard, refers to something or someone that can be easily known or familiarized with. While not widely recognized, several synonyms can capture the essence of acquaintable. "Approachable" comes to mind, as it implies the ease of establishing a connection or getting to know someone. "Familiar" is another term encompassing a similar meaning, indicating that something or someone is easy to recognize or understand. "Friendly" is also a suitable synonym, suggesting a welcoming and amicable nature. Lastly, "accessible" conveys the idea that something is readily available or approachable, making it easy to become acquainted with.