Decline
Part of speech: noun
Definition: Downward movement, fall. A sloping downward, e.g. of a hill or road. A weakening. A reduction or diminution of activity.
Part of speech: verb
Definition: To move downwards, to fall, to drop. To become weaker or worse. To refuse. To list the inflected forms of a noun, pronoun (and in some languages adjective) for case and number.
Example sentence: What makes me worry today is the alarming decline in the trust in democratic institutions - political parties, Parliaments, political leaders. Less and less people are going to the polls in most advanced democracies.
Slump
Part of speech: noun
Definition: A heavy or helpless collapse; a slouching or drooping posture; a period of poor activity or performance, especially an extended period.
Part of speech: verb
Definition: To collapse heavily or helplessly.To slouch or droop.To decline or fall off in activity or performance.
Example sentence: On the practice green, I hit a lot of four-footers with my right hand only. But whatever grip I'm using, you can bet I'm feeling good about it. Otherwise, I'd change. That's how I avoid slumps.