Equilateral is "posh" already. In simple words it means the sides of some object are all of the same length.
a posh word for the word big is Gargantuan.
Highfalutin
yes, its a very posh word and nobody but posh people say it anymore.
The posh word for blurb is "synopsis" or "teaser."
the word doff is not another word for posh. doff means to remove or take off, as clothing.
A Posh Font on MS Word is "French Script MT".
Lemonard
recreation
posh word for when the pollen from one flower reaches another
edwardian
"Imperative" is a sophisticated term for a bossy verb.
POSH stands for "Port Out, Starboard Home" in nautical terminology. Posh is a word of unknown derivation but there is no evidence that it ever stood for the custom of a Steamship line (usually P&O) stamping tickets POSH to ensure a shaded journey to and from India. There are no examples of Acromyms before the 20th Century the word posh is older its possible derivation is from the Romany cant word for money.