As abbreviations the difference between shh and sth
is that shh is (biochemistry) sonic hedgehog homolog (protein) while sth is something.
shh
English
Alternative forms
* sh
* shhh
Interjection
(
en interjection)
Requesting silence. Asking people to keep silent.
Synonyms
* hush!, shush!
sth
English
Abbreviation
(Abbreviation)
(head)
South
Anagrams
*