Timer adjectives are listed in this post. Each word below can often be found in front of the noun timer in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing TIMER.
automatic, digital
first, internal
minute, new
old, oven
second, short
Hope this word list had the adjective used with timer you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
Please add more adjectives to make this list more complete: