anastigmat vs lens system

anastigmat and lens system both are nouns.

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

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

anastigmat: compound lens or lens system designed to be free of astigmatism and able to form approximately point images
lens system: a transparent optical device used to converge or diverge transmitted light and to form images

Other hypernyms of anastigmat include lens, lense.

anastigmat (noun)	lens system (noun)
compound lens or lens system designed to be free of astigmatism and able to form approximately point images	a transparent optical device used to converge or diverge transmitted light and to form images