barb
Hook
bolt grip bond hook link seal
PEAK
gist
end
Apex , iota, site
The 'hook'.
A four letter word starting with the letter a is able.
4.06 in word form is four and six hundredths.
spit
a cape people
It depends on what you mean by 'four letter word'. Thea has four letters, so yes it is. It is not a swear word, so it's not that kind of 'four letter word'.