Nobody knows...
GETTYSBURG
The words who and owl both have one syllable.
Laugharne's Scoughall's
There are many examples of 3 syllable words. Some common 3 syllable words are:BananaAfricaFavoriteEnergy
* * * * * * * *
Some one syllable words that end with A are:abrafleamapaseaspatea
Examples of one syllable words are:aanareboarboreboxcancarcaredodogdoordougheatedgeeighteyefiveforfourgivegogoathihighheightinisitjayjokejoykeepkingkneelatelightlotmemoonmynonotnoteofoneownpoorpotpourquestquitquiteratrestrootroutesinsomesongthrowtotootoottwousevieviewwhatwhenwhoyearyetyouzipzonezoo
A letter that has only one syllable.
All of the words in your question except for "syllable."
It depends on the word. Some words have one syllable; some have many more.
one syllable
one syllable