The English language would be very dull without adjectives. They dress up our nouns whenever we need to punch things up a notch. So, that heartache you're feeling is no longer just a "heartache," it's a crippling heartache or debilitating heartache that is tearing you apart, or maybe just a small heartache that you'll get over quickly.
Whenever you're speaking or writing, you may want to get your point across with a little extra oomph. When it's time to do so, call in the big dogs: the adjectives.