The Collaborative International Dictionary of English v.0.48:
mizenmast \mizenmast\ n. mizzenmast. Syn: mizzen, mizen. [WordNet 1.5]WordNet (r) 3.0 (2006):
mizenmast n 1: third mast from the bow in a vessel having three or more masts; the after and shorter mast of a yawl, ketch, or dandy [syn: mizzenmast, mizenmast, mizzen, mizen]