Kithless is a rarely used word that means without friends or close companions. Synonyms for kithless include lonely, friendless, isolated, solitary, desolate, forlorn, abandoned, and bereft. Other possibilities include lonesome, estranged, alone, disconnected, unaccompanied, detached, and alienated. These words all convey the sense of being alone or lacking close relationships, but each has its own connotations and nuances. Choosing the right synonym will depend on the context and tone of the writing. Regardless of the word used, the feeling of being kithless is one that is often characterized by sadness and a yearning for human connection.