render vs retell

render is a noun but retell is not a noun.

Word	Noun	Adjective	Verb	Adverb
render	Yes	No	Yes	No
retell	No	No	Yes	No

As verbs, retell is a hypernym of render; that is, retell is a word with a broader meaning than render:

Other hypernyms of render include ingeminate, iterate, reiterate, repeat, restate.

render (noun)	retell (noun)
a substance similar to stucco but exclusively applied to masonry walls

render (verb)	retell (verb)
cause to become	to say, state, or perform again
melt (fat or lard) in order to separate out impurities	render verbally
bestow	make into fiction
pass down
restate (words) from one language into another language
coat with plastic or cement
give or supply
give an interpretation or rendition of
show in, or as in, a picture
give back
make over as a return
give something useful or necessary to
to surrender someone or something to another