- ...more angry...
- ...littler...
- ...less small...
- good, better, best (not "more good" or "gooder"; exception: "Put that money where it will do the most good." This isn't really a comparison at all, but could be confused for one.)
- angry, angrier, angriest
- little, smaller, smallest (or tinier, tiniest; never "littler, littlest;" exception: when the person speaking in dialogue is either uneducated or a child; and you won't want to use it in prose or narrative.
- tired, tireder, tiredest
- fast, faster, fastest
- slow, slower, slowest
- nitpicking, more nitpicking, most nitpicking (yep, applies to me and grammar, and, see, there are times when "more" and "most" are used with an adjective! More examples include "monumental," "phenomenal," "fabulous," etc.)
- able, abler, ablest (yes, really; the antonyms are "less able" and "least able")
If you have any questions about a particular comparative not listed here, please feel free to inquire!