anemone vs actiniarian

anemone and actiniarian both are nouns.

Word	Noun	Adjective	Verb	Adverb
anemone	Yes	No	No	No
actiniarian	Yes	No	No	No

As nouns, actiniarian is a hyponym of anemone; that is, actiniarian is a word with a more specific, narrower meaning than anemone:

anemone: marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton
actiniarian: any sea anemone or related animal

Other hyponyms of anemone include actinia, actinian.

anemone (noun)	actiniarian (noun)
marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton	any sea anemone or related animal
any woodland plant of the genus Anemone grown for its beautiful flowers and whorls of dissected leaves