holibut vs halibut

holibut and halibut both are nouns.

Word	Noun	Adjective	Verb	Adverb
holibut	Yes	No	No	No
halibut	Yes	No	No	No

As nouns, holibut and halibut are synonyms defined as:

holibut and halibut: marine food fish of the northern Atlantic or northern Pacific; the largest flatfish and one of the largest teleost fishes

holibut (noun)	halibut (noun)
marine food fish of the northern Atlantic or northern Pacific; the largest flatfish and one of the largest teleost fishes	marine food fish of the northern Atlantic or northern Pacific; the largest flatfish and one of the largest teleost fishes
	lean flesh of very large flatfish of Atlantic or Pacific