Oh brother are you ever reaching. Ever heard of synonyms?
Try looking in a thesaurus. Gee a entire book with words that have the same or similar meanings.
UNDERSTANDABLE
Entry: excusable
Function: adjective
Definition: allowable
Synonyms: all right, condonable, defensible, exculpatory, explainable, fair, forgivable, justifiable, minor, moderate, OK, pardonable, passable, permissible, plausible, reasonable, remittable, reprieve, slight, specious, temperate, tenable, trivial, understandable, venial, vindicable, vindicatory, warrantable, within limits
Sure there are fine lines between words. Next time you're talking about mass murder maybe you'll try to find a word that is a little more clear cut and can't be misinterpreted to mean you supported the act.
I weary of this. I gave you the benefit of the doubt and apologized. Now go away little man.