triton vs common newt

triton and common newt both are nouns.

Word	Noun	Adjective	Verb	Adverb
triton	Yes	No	No	No
common newt	Yes	No	No	No

As nouns, common newt is a hyponym of triton; that is, common newt is a word with a more specific, narrower meaning than triton:

triton: small usually bright-colored semiaquatic salamanders of North America and Europe and northern Asia
common newt: small semiaquatic salamander

Other hyponyms of triton include Triturus vulgaris, Notophthalmus viridescens, red eft, Pacific newt, eft.

triton (noun)	common newt (noun)
small usually bright-colored semiaquatic salamanders of North America and Europe and northern Asia	small semiaquatic salamander
tropical marine gastropods having beautifully colored spiral shells