desk vs writing table

desk and writing table both are nouns.

Word	Noun	Adjective	Verb	Adverb
desk	Yes	No	No	No
writing table	Yes	No	No	No

As nouns, writing table is a hyponym of desk; that is, writing table is a word with a more specific, narrower meaning than desk:

desk: a piece of furniture with a writing surface and usually drawers or other compartments
writing table: a desk used for writing

Other hyponyms of desk include davenport, escritoire, secretaire, secretary, writing desk.

desk (noun)	writing table (noun)
a piece of furniture with a writing surface and usually drawers or other compartments	a desk used for writing