3 ms·4. The plural of "fireman" is "firemen" (or, even better, "firefighters").by lylejohnson 16y ago4. The plural of "fireman" is "firemen" (or, even better, "firefighters").Semiapies 16y agoIt's just a off-the-cuff bit of piffle. Note the use of a generalization fallacy in the converse error example.spulec 16y agoThank you, corrected.