/ar/ /or/
So, just to keep you on your toes, here are two more times the letter r changes the sound of the vowel:
/ar/ spelled as ‘ar’
ar can be found anywhere in a word: art, dart, car — at the start, middle or end of a word.
bark is a homonym (homo = same, nym = name): words that are spelled the same and sound the same but have different meanings like bark (dog bark and tree bark).
Other homonyms:
bat (baseball bat, nocturnal animal)
bank (where you keep you money, at the edge of a river)
See below to read about homonyms, homophones and homographs - the trickiest words to spell.
/or/ spelled as ‘or’
or can be found anywhere in a word, and, of course, is a word all by itself:
organ or corn or for ..
bonus notes
Homophones
Prefix homo- “the same”
Suffix -phone “sound”
same pronunciation
different meaning
different spelling
flower, flour
to, too, two
there, their, they’re
your, you’re
by, buy, bye
brake, break
Homonyms
Prefix homo- “the same”
Suffix -nym “name”
same pronunciation
same spelling
different meanings
bank (for $, river)
bark (tree, dog)
bat (baseball, animal)
lie (lie down to sleep, untruth)
fall (fall down, autumn)
Homographs
Prefix homo- “the same”
Suffix -graph “writing”
same spelling
different pronunciation
different meanings
tear (cry, rip paper)
bow (bow after a performance, ribbon in your hair)
minute (time, small)
close (to be near something, to shut)