Frog or toad (9)
I believe the answer is:
amphibian
I believe this is a double definition.
'frog' is the first definition.
(thesaurus)
'toad' is the second definition.
(thesaurus)
(Other definitions for amphibian that I've seen before include "aircraft" , "One lives on land and in water" , "Animal able to live in both land and water" , "versatile vehicle" , "Vehicle for use on land or water" .)