convex lens vs converging lens

convex lens and converging lens both are nouns.

Word	Noun	Adjective	Verb	Adverb
convex lens	Yes	No	No	No
converging lens	Yes	No	No	No

As nouns, convex lens and converging lens are synonyms defined as:

convex lens and converging lens: lens such that a beam of light passing through it is brought to a point or focus

convex lens (noun)	converging lens (noun)
lens such that a beam of light passing through it is brought to a point or focus	lens such that a beam of light passing through it is brought to a point or focus