The word "geezerhood" is often used to describe old age or the state of being elderly. However, there are several other synonyms that can be used to convey the same meaning. For instance, words like senescence, decrepitude or superannuation can be used to describe the same concept. These words are more formal and come with a slightly negative connotation. The words matureness, post-maturity, middle age and gray hair are some of the more positive synonyms that can be used to describe the concept of old age. No matter what word is chosen, the important thing is to use it with respect and understanding for the wisdom and experience that come with age.