scatter vs backscatter

scatter is a noun but backscatter is not a noun.

Word	Noun	Adjective	Verb	Adverb
scatter	Yes	No	Yes	No
backscatter	No	No	Yes	No

As verbs, backscatter is a hyponym of scatter; that is, backscatter is a word with a more specific, narrower meaning than scatter:

scatter: cause to separate
backscatter: scatter (radiation) by the atoms of the medium through which it passes

scatter (noun)	backscatter (noun)
the act of scattering
a haphazard distribution in all directions

scatter (verb)	backscatter (verb)
cause to separate	scatter (radiation) by the atoms of the medium through which it passes
distribute loosely
sow by scattering
move away from each other
to cause to separate and go in different directions
strew or distribute over an area