tea vs iced tea

tea and iced tea both are nouns.

Word	Noun	Adjective	Verb	Adverb
tea	Yes	No	No	No
iced tea	Yes	No	No	No

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

Other hyponyms of tea include cambric tea, cuppa, cupper, herb tea, herbal, herbal tea, ice tea, sun tea, white tea.

tea (noun)	iced tea (noun)
a beverage made by steeping tea leaves in water	strong tea served over ice
a light midafternoon meal of tea and sandwiches or cakes
dried leaves of the tea shrub; used to make tea
a tropical evergreen shrub or small tree extensively cultivated in e.g. China and Japan and India; source of tea leaves