Self-serving and Self-importance

Self-serving adjective - Overly concerned with one's own desires, needs, or interests.

Self-importance and self-serving are semantically related. In some cases you can use "Self-importance" instead a noun phrase "Self-serving".

Self-importance noun - An exaggerated sense of one's importance that shows itself in the making of excessive or unjustified claims.

Self-serving and self-importance are semantically related. Sometimes you can use "Self-serving" instead a noun phrase "Self-importance".