jigger vs jiggermast

jigger and jiggermast both are nouns.

Word	Noun	Adjective	Verb	Adverb
jigger	Yes	No	No	No
jiggermast	Yes	No	No	No

As nouns, jigger and jiggermast are synonyms defined as:

jigger and jiggermast: any small mast on a sailing vessel; especially the mizzenmast of a yawl

jigger (noun)	jiggermast (noun)
larval mite that sucks the blood of vertebrates including human beings causing intense irritation	any small mast on a sailing vessel; especially the mizzenmast of a yawl
a small glass adequate to hold a single swallow of whiskey
any small mast on a sailing vessel; especially the mizzenmast of a yawl