Protocercal is a coordinate term of homocercal.

As adjectives the difference between protocercal and homocercal

is that protocercal is (zoology) having a caudal fin extending around the end of the vertebral column, like that which is first formed in the embryo of fishes; diphycercal while homocercal is (ichthyology) describing the symmetric tail of a fish that has two lobes extending from the end of the vertebral column.

As nouns the difference between colour and homochromy

is that colour is (lb) the spectral composition of visible light while homochromy is (zoology) the use, by an organism, of the same colour as its background as a means of protection.

As an adjective colour

is conveying colour, as opposed to shades of grey.

As a verb colour

is to give something colour.

As nouns the difference between background and homochromy

is that background is one's social heritage; what one did in the past/previously while homochromy is (zoology) the use, by an organism, of the same colour as its background as a means of protection.

As a verb background

is to put in a position that is not prominent.

As an adjective pelagic

is (biology) living in the open sea rather than in coastal or inland waters.

As an adverb pelagically is

in a pelagic way; in or of the open sea.

As adjectives the difference between symmetric and homocercal

is that symmetric is symmetrical while homocercal is (ichthyology) describing the symmetric tail of a fish that has two lobes extending from the end of the vertebral column.

As a noun tail

is .

As an adjective homocercal is

(ichthyology) describing the symmetric tail of a fish that has two lobes extending from the end of the vertebral column.

As a noun fish

is a cold-blooded vertebrate animal that lives in water, moving with the help of fins and breathing with gills.

As a verb fish

is to try to catch fish, whether successfully or not.

As a proper noun Fish

is {{surname|lang=en}.

As an adjective homocercal is

describing the symmetric tail of a fish that has two lobes extending from the end of the vertebral column.

As a noun lobe

is .

As an adjective homocercal is

(ichthyology) describing the symmetric tail of a fish that has two lobes extending from the end of the vertebral column.

Orthodoxness is a synonym of conventionality.

As nouns the difference between conventionality and orthodoxness

is that conventionality is the state of being conventional while orthodoxness is the state or condition of being orthodox.

Orthodoxness is a synonym of orthodoxy.

As nouns the difference between orthodoxy and orthodoxness

is that orthodoxy is correctness in doctrine and belief while orthodoxness is the state or condition of being orthodox.

As a proper noun Orthodoxy

is the Eastern Orthodox Church, including Greek Orthodox Church, Romanian Orthodox Church, Russian Orthodox Church, and Serbian Orthodox Church.