tunic vs kameez

tunic and kameez both are nouns.

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

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

tunic: any of a variety of loose fitting cloaks extending to the hips or knees
kameez: a long tunic worn by many people from the Indian subcontinent (usually with a salwar or churidars)

Other hyponyms of tunic include chiton, gymslip, kirtle, surcoat, tabard.

tunic (noun)	kameez (noun)
any of a variety of loose fitting cloaks extending to the hips or knees	a long tunic worn by many people from the Indian subcontinent (usually with a salwar or churidars)
an enveloping or covering membrane or layer of body tissue