keel vs fin keel

keel and fin keel both are nouns.

Word	Noun	Adjective	Verb	Adverb
keel	Yes	No	Yes	No
fin keel	Yes	No	No	No

keel (noun)	fin keel (noun)
one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability	a metal plate projecting from the keel of a shallow vessel to give it greater lateral stability
the median ridge on the breastbone of birds that fly
a projection or ridge that suggests a keel

keel (verb)	fin keel (verb)
walk as if unable to control one's movements