INTERJECTIONS

These words do not form part of the normal structures of English.  They are used on their own, to signify an emotional outburst. They are usually followed by an exclamation mark.

aha, ahem, ahh, ahoy, alas, argh, aw
bingo, baah, boo, bravo, brrr 
cheers, congratulations 
drat, damn, darn, duh 
eek, eh, encore, eureka 
fiddlesticks,  
gee whiz, golly, goodbye, goodness, good grief, gosh
ha, ha-ha, hallelujah, hello, hey, hmm, huh?, humph, hurray 
oh, oh dear, oh well, ooops, ouch, ow 
phew, phooey, pooh, pow 
rats 
shh, shoo 
thanks, there, tut-tut 
uh-huh, uh-oh, ugh 
​well, whoa, whoops, wow 
yeah, yes, yikes, yippee, yo, yuck