true toad vs natterjack

true toad and natterjack both are nouns.

Word	Noun	Adjective	Verb	Adverb
true toad	Yes	No	No	No
natterjack	Yes	No	No	No

As nouns, natterjack is a hyponym of true toad; that is, natterjack is a word with a more specific, narrower meaning than true toad:

true toad: tailless amphibian similar to a frog but more terrestrial and having drier warty skin
natterjack: common brownish-yellow short-legged toad of western Europe; runs rather than hops

true toad (noun)	natterjack (noun)
tailless amphibian similar to a frog but more terrestrial and having drier warty skin	common brownish-yellow short-legged toad of western Europe; runs rather than hops