Hiss, Siss, and Sizz are all four letter words for sibilate. Hiss is probably the one you are looking for.
Lisps. The "u" is probably incorrect.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 7 words with the pattern SIB-L----. That is, nine letter words with 1st letter S and 2nd letter I and 3rd letter B and 5th letter L. In alphabetical order, they are: sibilance sibilancy sibilants sibilated sibilates sibilator sibylline
without
a for affluent
a for affluent
a for affluent
ore
mistime
after, alder, adder
That's astounding.
Mammals is the word.
the word is yeah!
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 25 words with the pattern S--I--TE-. That is, nine letter words with 1st letter S and 4th letter I and 7th letter T and 8th letter E. In alphabetical order, they are: saginated saginates salimeter salivated salivates sanitated sanitates seminated seminates sericites sibilated sibilates silicated silicates solicited solidated solidates sonicated sonicates sphincter sprighted stairstep supinated supinates suricates