excellency, grade, superbness, class
Excellence is another word that can be used to mean quality in the work force. You can also use the words attribute to describe someone provides good service in a company.
spot
Not achieving standard quality
male model
other words for quality are high standards
Here are 4 words to get you started: unready, unripened, green, or immature
QB is another way to say quarterback so I'm guessing it is quarterback-ness or in other words the quality of a person being a quarterback.
Speaking, orating, discoursing, speechifying (the last example is colloquial, and implies that the quality of the speech is poor).
Opposite numbers are another words for negative numbers.-4 is opposite of +45,6,7,8,9, and so on
adjectives that describe words
The quality of a charge video is 720p. In other words the resolution for the video is very high quality for a phone, but it is not the best quality available.
The age depends on quality of food, so varies from one area to another, but generally is from 4-8 years of age.