problem solving vs convergent thinking

problem solving and convergent thinking both are nouns.

Word	Noun	Adjective	Verb	Adverb
problem solving	Yes	No	No	No
convergent thinking	Yes	No	No	No

problem solving (noun)	convergent thinking (noun)
the thought processes involved in solving a problem	thinking that brings together information focussed on solving a problem (especially solving problems that have a single correct solution)
the area of cognitive psychology that studies the processes involved in solving problems