^
"organelle" is good.
holocaust, a good word with an ugly modern denotation.
The word comes from
'olocaust, meaning "burnt sacrifice" originally. In Greek, the aspirant (
') provides the breathy "h" sound; most English words which stem from Greek and are spelled with an "h" have the aspirant in the original--as in
hoi polloi ('οἱ πολλοί) which means "the many" and most often "the rabble" when the term trips from the tongue of an aristocrat.
This also reminds me that, in English, one says "an" before a word beginning with a vowel. "An house" is awkward sounding to most but is correct as opposed to "a house." You might consider this usage a hangover from the Greek aspirant.