Most of these aren’t actually antonyms. For example, a “bill”, in both senses, is a document which specifies an amount of money. I don’t even see the reasoning on how the two listed meanings of “comprise” are particularly different at all, much less antonyms. “Handicap”, as in sports, is an acknowledgement of a handicap, as in disability. A moot point is one which is subject only to argument, and is therefore irrelevant for practical considerations. “Quantum”, in all senses, means discrete, without any middle ground, and actually says nothing about size. “Sanguine” just means “bloody”; in the old theory of the four humours, someone who had an excess of blood was cheerful. “Scan” means “examine”, without regards to thoroughnes. A “shank” is an end (of anything, not just a time); it doesn’t specify which end. I’ve never heard “splice” used to mean “cut in two”; it always means “join”. And “temper” means to mix something in; that intermixing might harden or soften the thing.