tentacular vs tentacle

tentacular is not a noun while tentacle is a noun.

Word	Noun	Adjective	Verb	Adverb
tentacular	No	Yes	No	No
tentacle	Yes	No	No	No

tentacular (noun)	tentacle (noun)
	any of various elongated tactile or prehensile flexible organs that occur on the head or near the mouth in many animals; used for feeling or grasping or locomotion
	something that acts like a tentacle in its ability to grasp and hold

tentacular (adjective)	tentacle (adjective)
of or relating to or resembling tentacles