G5819 - Strong's Greek Lexicon Number

Strong's:

Synonyms
See Definition for baros { [G922]}
See Definition for onkos { [G3591]}
See Definition for phortion { [G5413]}

922 refers to weight, 3591 to bulk, and either may be oppressive?
922 is a load in so far as it is heavy, 5413 a burden in so far as
it is borne? Hence 5413 may be either heavy or light.