A) If you told him you needed a "reostat", he'd probably give you a "rheostat" for the dash light dimmer inside the headlight switch since he knows what a rheostat is.
B) If you were in a technical forum and used the wrong term, yes, you would be corrected. If you want to spread disinformation without being corrected, start your own website called "Mye_oppinyuns_abut_ evverting.com" and say whatever you want using whatever spelling you think is right. This BBS is here to help people by giving them correct information, including terminology, and the language most often used here seems to be English, whose words already have spellings so there's no need to add confusion by creating your own spelling for words that already exist. Wenn du Deutsch schreiben moechtest, koennten wir uns auch unterhalten, aber bitte, keine Vertippungen.
C) It appears he DID understand you, but the next person to read this thread might not if you use the wrong terms, spell them wrong, or use another language.
D) This forum IS a good place to teach electronics as they relate to Ford 12V HVAC. That's why it exists.
E) It takes 2 to tango, and you're continuing to use terms you know are wrong just as much as he is (& I am) continuing to correct you, so you're generating just as much "heat" as we are.