Yes. The island name Borneo ends with an "oh" sound, and open begins with an "oh" sound. This is a long O.
open
No, the word "open" does not have a long vowel. It is pronounced with a short /o/ sound.
spelling slow do it a long o sound
afloatboastbow (as in "a bow in her hair")boatbonechokeconecovecoalcoastcrowcoatcoaxcoachcroakdoledomedozedopedrovedroneelbowfrozenfloatfoalflowfoamgroangoldgoatgroatgloatinggoalgropegoholehomeholdhoaxhosejokeknowlobeloneloadloafloanloathmoatmoldmotormopenodenoteoakoathoakenphonepokepolepopeprobeposeprosepoachquoteroberoderoserowroteroastsmokesnowscopestonesolestolestrobesoapsoakstrodethosetotetoasttonevotewoewhoayokezone
Some happy words that start with O include: Overjoyed Optimistic Open-hearted
Some examples of words with a long "o" sound in the first or second syllable include "total," "control," "solo," and "focus."
It is a long O sound, as in the rhyming words ghost and post. Other words use OA for the long O sound: boast, roast, and toast.
The O in cost has an AW sound (caret O), as in law and lost. The AW sound is also heard in O words such as off and long, and A words such as ball and call.
Some words that start with the letter O are, orange, old and Organ. There is also open, olive and order.
The "o" in the words "to" and "do" is short. It is pronounced as /ʊ/ in both words.
open, outside, off
The word open has two vowels; the O is long, the E is a weak sound.