Egomania is basically intolerably self-centred. In a more technical sense, it's an obsession -- an obsessive preoccupation with one's own self, usually in the form of following own impulses and have delusions of grandeur.
Megalomania is a rather loose term, and usually means have delusional fantasies of omnipotence (having unlimited or very great power, whatever 'power' might mean to that person). Interestingly, megalomania was the standard term for narcissistic personality disorder before the 1960s (so far as I recall from my psychology degree over 30 years ago).
Usually, the time to obtain a degree is more than the time required to obtain a post-secondary certification.
<h3>What is a post-secondary certification?</h3>
It is a certificate obtained in any educational program after you graduate from school. Depending on the program, a certificate can be obtained after some months or years.
<h3>What is a degree?</h3>
This is a title you obtain after completing a whole university program, which often requires about 5 years.
Learn more aobut post-secondary certification in: brainly.com/question/2588139
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