In plurale tantum terms the difference between shears and loppers
is that
shears is a tool consisting of two blades with bevel edges, connected by a pivot, used for cutting cloth, or for removing the fleece from sheep etc while
loppers is a gardening tool used for lopping.
As nouns the difference between shears and loppers
is that
shears is plural of lang=en while
loppers is a gardening tool used for lopping.
As verbs the difference between shears and loppers
is that
shears is third-person singular of shear while
loppers is third-person singular of lopper.