kettle vs teakettle

kettle and teakettle both are nouns.

Word	Noun	Adjective	Verb	Adverb
kettle	Yes	No	No	No
teakettle	Yes	No	No	No

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

kettle (noun)	teakettle (noun)
a metal pot for stewing or boiling; usually has a lid	kettle for boiling water to make tea
a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it
(geology) a hollow (typically filled by a lake) that results from the melting of a mass of ice trapped in glacial deposits
the quantity a kettle will hold