pulp vs wood pulp

pulp and wood pulp both are nouns.

Word	Noun	Adjective	Verb	Adverb
pulp	Yes	No	Yes	No
wood pulp	Yes	No	No	No

As nouns, wood pulp is a hyponym of pulp; that is, wood pulp is a word with a more specific, narrower meaning than pulp:

pulp: a mixture of cellulose fibers
wood pulp: wood that has been ground to a pulp; used in making cellulose products (as rayon or paper)

Other hyponyms of pulp include bagasse.

pulp (noun)	wood pulp (noun)
the soft inner part of a tooth	wood that has been ground to a pulp; used in making cellulose products (as rayon or paper)
an inexpensive magazine printed on poor quality paper
any soft or soggy mass
a soft moist part of a fruit
a mixture of cellulose fibers

pulp (verb)	wood pulp (verb)
reduce to pulp
remove the pulp from, as from a fruit