However, if an adverb can also function as an adjective, then a hyphen may be or should be used for clarity, depending on the style guide. For example, the phrase " reasons" ("reasons that are more important") is distinguished from "more important reasons" ("additional important reasons"), where "more" is an adjective. Similarly, " scenery" (with a mass-noun) is distinct from "more beautiful scenery". (In contrast, the hyphen in "a reason" is not necessary, because the syntax cannot be misinterpreted.) A few short and common words—such as "well", "ill", "little", and "much"—attract special attention in this category. The hyphen in "well- noun", such as in "well-differentiated cells", might reasonably be judged superfluous (the syntax is unlikely to be misinterpreted), yet plenty of style guides call for it. Because "early" has both adverbial and adjectival senses, its hyphenation can attract attention; some editors, due to comparison with "advanced-stage disease" and "adult-onset disease", like the parallelism of "early-stage disease" and "early-onset disease". Similarly, the hyphen in "little-celebrated paintings" clarifies that one is not speaking of little paintings.