Words similar to ticking

Example sentences for: ticking

How can you use “ticking” in a sentence? Here are some example sentences to help you improve your vocabulary:

McCain : The Social Security Trust Fund is a ticking time bomb.
In an editorial Thursday, the Manila Times of the Philippines said that "the imagery of the bomb--the mushroom cloud, the ticking clock--has suddenly re-entered the public consciousness once more as India, in full view of the world, conducted five nuclear tests and then proceeded to declare itself a nuclear weapons state."
For the past few weeks my usual stack of junk mail has been supplemented with a steady stream of 2001 tax statements and forms, reminding me that the clock has begun ticking towards April 15.
There I found a watch with hands that suited me, made my purchase, and left, but a question was still ticking within: analog watch ? Presumably, the analog refers to measuring time by an analog, with hands and a circular face, rather than by the more scientific-looking digital system.
“There will always be a need for new antibiotics because the clock starts ticking on the useful lifetime of any antibiotic once you start to use it.