Not all of them, just the ones I've chosen. Mostly nouns. A few proper nouns.
There are larger lists. E.g.
Abe ace ale Alf ant ape axe bat Bea bee Bob boy bug bus cap car cat Che cod cow cub cup dad Dan Dee den dig doc doe dog dot duo elf elk emu ent Eve eye fae fig fin fir Flo fly foe fog fox gin gnu gum Gus guy Hal ham hat hay hen his hub hue hut Ian ice imp ink inn ivy Jan Jay Joe Joy jug Ken kid koi lab law leg lid Lou Mac mag man map mat med men mob Moe mug mum nap Ned nit nun nut oak Odo orb owl pac Pam pan Pat pea pen pig qat Qin que Raj rat Ray rib Rob rye Sam saw sim Sue Sun tad tea Ted tie tip toe Tam Tom top tot toy tub upo Uri Val van vat wax web Wes wok wry Wyn xis Xia yak yaw yen yep Yon zen zip zit Zoe zoo
In Alice and Bob use cases, I prefer to use 3 letter names. E.g. Abe, Bob, Che, Eve, and Mac.