backlog vs Yule log

backlog and Yule log both are nouns.

Word	Noun	Adjective	Verb	Adverb
backlog	Yes	No	Yes	No
Yule log	Yes	No	No	No

As nouns, Yule log is a hyponym of backlog; that is, Yule log is a word with a more specific, narrower meaning than backlog:

backlog (noun)	Yule log (noun)
an accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services)	large log traditionally burned at Christmas
something kept back or saved for future use or a special purpose
the large log at the back of a hearth fire

backlog (verb)	Yule log (verb)
accumulate and create a backlog