Swollen head and Self-importance

Self-importance and swollen head are semantically related. In some cases you can use "Self-importance" instead a noun phrase "Swollen head".

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

Swollen head and self-importance are semantically related. You can use "Swollen head" instead a noun phrase "Self-importance".