tunic vs cloak

tunic and cloak both are nouns.

Word	Noun	Adjective	Verb	Adverb
tunic	Yes	No	No	No
cloak	Yes	No	Yes	No

As nouns, cloak is a hypernym of tunic; that is, cloak is a word with a broader meaning than tunic:

tunic: any of a variety of loose fitting cloaks extending to the hips or knees
cloak: a loose outer garment

tunic (noun)	cloak (noun)
any of a variety of loose fitting cloaks extending to the hips or knees	a loose outer garment
an enveloping or covering membrane or layer of body tissue	anything that covers or conceals

tunic (verb)	cloak (verb)
	cover with or as if with a cloak
	cover as if with clothing
	hide under a false appearance