semi-formal vs semiformal

semi-formal and semiformal both are adjectives.

Word	Noun	Adjective	Verb	Adverb
semi-formal	No	Yes	No	No
semiformal	No	Yes	No	No

As adjectives, semi-formal and semiformal are synonyms defined as:

semi-formal and semiformal: moderately formal; requiring a dinner jacket

Other synonyms of semi-formal include black-tie.

semi-formal (adjective)	semiformal (adjective)
moderately formal; requiring a dinner jacket	moderately formal; requiring a dinner jacket