rendering vs explanation

rendering and explanation both are nouns.

Word	Noun	Adjective	Verb	Adverb
rendering	Yes	No	No	No
explanation	Yes	No	No	No

As nouns, explanation is a hypernym of rendering; that is, explanation is a word with a broader meaning than rendering:

rendering (noun)	explanation (noun)
giving in acknowledgment of obligation	thought that makes something comprehensible
the act of interpreting something as expressed in an artistic performance	a statement that makes something comprehensible by describing the relevant structure or operation or circumstances etc.
perspective drawing of an architect's design	the act of explaining; making something plain or intelligible
a coat of stucco applied to a masonry wall
an explanation of something that is not immediately obvious
a performance of a musical composition or a dramatic role etc.
a written communication in a second language having the same meaning as the written communication in a first language