Pal
The three-letter word for fish egg(s) is roe.
There isn't one that begins with an 'S' A three letter word for an evergreen tree is fir.
sum
sop
The word you are looking for is "sap."
The five-letter word with three 'R's is "error." It fits the criteria by having three occurrences of the letter 'R' and consists of a total of five letters.
Sassafrass!
The word his is the only 3 letter word that can be spelled with the letters h-i-s.
Six
sot
_s_ = ask! :) _s_ = ish..? I'd go with ask !
its, has, his, abs, bus, dis, gas, ins