pruner vs pruning hook

pruner and pruning hook both are nouns.

Word	Noun	Adjective	Verb	Adverb
pruner	Yes	No	No	No
pruning hook	Yes	No	No	No

As nouns, pruner and pruning hook are synonyms defined as:

pruner and pruning hook: a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees

Other synonyms of pruner include lopper.

pruner (noun)	pruning hook (noun)
a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees	a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees
a worker who thins out and trims trees and shrubs