mizenmast vs mizen

mizenmast and mizen both are nouns.

Word	Noun	Adjective	Verb	Adverb
mizenmast	Yes	No	No	No
mizen	Yes	No	No	No

As nouns, mizenmast and mizen are synonyms defined as:

mizenmast and mizen: third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy

Other synonyms of mizenmast include mizzen, mizzenmast.

mizenmast (noun)	mizen (noun)
third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy	third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy
	fore-and-aft sail set on the mizzenmast