pruner vs lopper

pruner and lopper both are nouns.

Word	Noun	Adjective	Verb	Adverb
pruner	Yes	No	No	No
lopper	Yes	No	No	No

As nouns, pruner and lopper are synonyms defined as:

pruner and lopper: 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 pruning hook.

pruner (noun)	lopper (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