diverging lens vs lens system

diverging lens and lens system both are nouns.

Word	Noun	Adjective	Verb	Adverb
diverging lens	Yes	No	No	No
lens system	Yes	No	No	No

As nouns, lens system is a hypernym of diverging lens; that is, lens system is a word with a broader meaning than diverging lens:

diverging lens: a lens such that a parallel beam of light passing through it is caused to diverge or spread out
lens system: a transparent optical device used to converge or diverge transmitted light and to form images

Other hypernyms of diverging lens include lens, lense.

diverging lens (noun)	lens system (noun)
a lens such that a parallel beam of light passing through it is caused to diverge or spread out	a transparent optical device used to converge or diverge transmitted light and to form images