yes check-up should be hyphenated
It is not hyphenated.
Close words to checkup would be:GallopHiccupScallop
Motorcycle is not hyphenated
No it's not hyphenated.
Time for a Checkup:Time for a checkup - Time for a checkup.I am gonna Check your ears, check your eyes, find out how much you've grown.(Time for a checkup)Then I listen to your heart beat, fix you up - ready to go.(Time for a checkup)It's ok if you wiggle. This will only tickle a little.Time for a checkup - Time for a checkup.
words are only hyphenated when they have a separate meaning when separated than they do when hyphenated
No, "hardworking" is not hyphenated.
Yes it should be hyphenated.
It can be. Some words can be seen both hyphenated and non-hyphenated.
"Field" is not hyphenated.
No they shouldn't be hyphenated.