Some words starting with 'q' and ending in 's' which aren't also plurals or '-s' verbs are:
quoits (a throwing game)
Qantas (an Australian airline)
Quintus (a masculine given name, frequently indicating a fifth-born son or child)
quadratus (a quadrilateral muscle)
queens
Quickly,
Quil
Quaint is a 6 letter word that begins with the letter q and ends with t.
The country that starts with P and ends with S is Philippines.
quotes
queens
No, there is no English word that starts with "q" and ends with "j."
The word is "souq."
queenq kivi
QUINCE
Quickly,
quigelj
Quil
quail
qualcomm
There are no valid English word that starts with J and ends with Q. For reference, here are all the words that end with Q but none start with J: suq. tranq. umiaq. qepiq.