Octocoral is a synonym of octocoralline.

Octocoralline is often a misspelling of octocoral.

Octocoralline has no English definition.

As a noun octocoral is

an anthozoan of the subclass Alcyonaria, having eight-branched tentacles and eight septa.

As nouns the difference between substitute and arsoles

is that substitute is a replacement or stand-in for something that achieves a similar result or purpose while arsoles is any of a number of substituted analogs of arsole; arsole-like chemicals.

As a verb substitute

is to use in place of something else, with the same function.

As an adjective analog

is analogue (being represented by a continuously variable physical quantity).

As a noun arsoles is

any of a number of substituted analogs of arsole; arsole-like chemicals.

As nouns the difference between arsole and arsoles

is that arsole is an unsaturated, five-membered heterocyclic compound of arsenic, C₄H₅As; any substituted form of this compound while arsoles is any of a number of substituted analogs of arsole; arsole-like chemicals.

As a proper noun anthozoa

is .

As a noun anthozoan is

(marine biology) a marine invertebrate of the class anthozoa, such as a sea anemone or coral.

As a proper noun coral

is .

As a noun anthozoan is

(marine biology) a marine invertebrate of the class anthozoa, such as a sea anemone or coral.

Anthozoic is a related term of anthozoan.

As an adjective anthozoic

is of or pertaining to the anthozoa.

As a noun anthozoan is

(marine biology) a marine invertebrate of the class anthozoa, such as a sea anemone or coral.

As nouns the difference between polyp and corallite

is that polyp is an abnormal growth protruding from a mucous membrane while corallite is the hard outer cup of a coral polyp.

As nouns the difference between diatom and theca

is that diatom is a group of minute unicellular algae having a siliceous covering of great delicacy, now categorized as class class: Diatomophyceae or division Bacillariophyta, formerly all included in the order order: Diatomaceae, now obsolete while theca is any external case or sheath.

As nouns the difference between dinoflagellate and theca

is that dinoflagellate is any of many marine protozoa, of the phylum dinoflagellata, that have two flagella while theca is (biology) any external case or sheath.