workout / to work out
I don't think this job is going to work out.
WHICH WORD?

to work outworkout

A writing and usage problem;
​not speaking.
UPDATED: OCT 2021

Phrasal Verb:  to work out  ​

You will use "work out" much more than you will "workout" unless you work at a gym or go to one a lot.  
  • ​​calculate, solve a problem​
  • ​to exercise
  • ​The verb is used more often than the noun.

Noun/Adjective: workout

Use as a Subject or Adjective describing something, "I workout at the gym 3 times a week."
  • When you exercise at the gym,that is a workout.
  • This is the least used of the two.   
EFP-WHICH WORD: to work out
I could never work out a solution to this problem.

EXAMPLES:  ​to work out ​

  1. ​I can't  work out this math problem.
    ​
  2. If this job doesn't work out, I'm moving back to the US.

  3. Do you think their marriage will work out?

  4. You need to work out your problems with your business partner before the situation gets worse.

  5. After we work out this software problem, I'm going to lunch. Want to come?​
EFP-WHICH WORD: workout
She is having a good workout!

EXAMPLES:  workout​

  1. I had a great workout at the gym last night. I feel great this morning.

  2. Workouts are good for you, but you shouldn't over do them.

  3. My workouts take about 15 minutes.  I can't do more than that.​

  4. How many workouts did you do last week? Three!
    ​
  5. Which is the best gym to do a workout at?
    TopFit on 23rd Street