Stercoricolous, Euphonious, Saccharine, Anonalous???

Last night I found A Dictionary of Synonyms and Antonyms. Now, you may think this is a little strange, abnormal, queer, odd, eccentric, anomalous, and quaint, but I rather enjoy reading things like that. So I picked it up right away and started reading it. I would think of words and look them up quickily, swiftly, promptly, speedily, rapidly, and reptatorially...oh wait! that is an antonym! Anway, then I'd read all their synonyms and antonyms. But I ran into quite a few hard, arduous, difficult, tiolsome, obdurat, austere, pitilous, and even cruel words. Some were very long, lengthy, endless, elongated, and outstretched. Others were practically impossible, impervious, inconseivable, and unreadable. Phew!