forty

forty /ˈfoɚti/ noun
plural forties
forty
/ˈfoɚti/
noun
plural forties
Britannica Dictionary definition of FORTY
1 
[count] : the number 40
2 
forties [plural]
a  : the numbers ranging from 40 to 49
b  : a set of years ending in digits ranging from 40 to 49

— fortieth

/ˈfoɚtijəθ/ noun, plural fortieths [count]

— fortyish

/ˈfoɚtijɪʃ/ adjective