follow-up vs followup

follow-up and followup both are nouns.

Word	Noun	Adjective	Verb	Adverb
follow-up	Yes	No	No	No
followup	Yes	No	No	No

As nouns, follow-up and followup are synonyms defined as:

follow-up and followup: a subsequent examination of a patient for the purpose of monitoring earlier treatment

Other synonyms of follow-up include reexamination, review.

As nouns, follow-up and followup are synonyms defined as:

follow-up and followup: an activity that continues something that has already begun or that repeats something that has already been done

As nouns, follow-up and followup are synonyms defined as:

follow-up and followup: a piece of work that exploits or builds on earlier work

follow-up (noun)	followup (noun)
a subsequent examination of a patient for the purpose of monitoring earlier treatment	a subsequent examination of a patient for the purpose of monitoring earlier treatment
an activity that continues something that has already begun or that repeats something that has already been done	an activity that continues something that has already begun or that repeats something that has already been done
a piece of work that exploits or builds on earlier work	a piece of work that exploits or builds on earlier work