quick
Jot Jet Jump
An eight letter word for wealthy is affluent.
'Nibbles' would fit.
Jolly is another five letter word meaning merry or happy is another.
Jack.
An antagonym is another word for a contranym, a single word with two opposing meanings - such as "fast", meaning, "quick" or "unmoving".
pass
deviltry
What is a 7 letter word meaning "Entertaining another as a guest?"
overjoyed
great
gust