What word can be an adjective and adverb?

There are many Words that can be adjectives or adverbs depending on how they are used. They include some adverbs of time, manner, degree, or condition. Some examples include:

Time: early, late, daily, weekly, yearly, hourly, quarterly

(e.g. weekly report, mow the lawn weekly)

Manner: fast, slow, high, low, straight, just, left, right

(e.g. a just decision, just barely)

Degree: most

(e.g. most people, the most impressive)

Condition: clear, clean, dirty, hard

(e.g. a hard task, he works hard -- not hardly)