spraying vs crop-dusting

spraying and crop-dusting both are nouns.

Word	Noun	Adjective	Verb	Adverb
spraying	Yes	No	No	No
crop-dusting	Yes	No	No	No

As nouns, spraying and crop-dusting are synonyms defined as:

spraying and crop-dusting: the dispersion of fungicides or insecticides or fertilizer on growing crops (often from a low-flying aircraft)

spraying (noun)	crop-dusting (noun)
the application of a liquid in the form of small particles ejected from a sprayer	the dispersion of fungicides or insecticides or fertilizer on growing crops (often from a low-flying aircraft)
the dispersion of fungicides or insecticides or fertilizer on growing crops (often from a low-flying aircraft)
a quantity of small objects flying through the air