lacertid vs sand lizard

lacertid and sand lizard both are nouns.

Word	Noun	Adjective	Verb	Adverb
lacertid	Yes	No	No	No
sand lizard	Yes	No	No	No

As nouns, sand lizard is a hyponym of lacertid; that is, sand lizard is a word with a more specific, narrower meaning than lacertid:

lacertid: Old World terrestrial lizard
sand lizard: a common and widely distributed lizard of Europe and central Asia

Other hyponyms of lacertid include Lacerta agilis, green lizard, Lacerta viridis.

lacertid (noun)	sand lizard (noun)
Old World terrestrial lizard	a common and widely distributed lizard of Europe and central Asia
	one of the most abundant lizards in the arid western United States