bow-tie vs bow tie

bow-tie and bow tie both are nouns.

Word	Noun	Adjective	Verb	Adverb
bow-tie	Yes	No	No	No
bow tie	Yes	No	No	No

As nouns, bow-tie and bow tie are synonyms defined as:

Other synonyms of bow-tie include bowtie.

bow-tie (noun)	bow tie (noun)
a man's tie that ties in a bow	a man's tie that ties in a bow