self-delusion 
noun [mass noun]
The action of deluding oneself; failure to recognize reality: he retreats into a world of fantasy and self-delusion...
- Negotiations are the heroin of Westerners addicted to self-delusion.
- When anybody calls their bluff and punctures this self-delusion, they can only cope by insulting and vilifying their critics.
- My theory is that many chiefs are victims of self-delusion, their own double-speak.
- strontium
- strop
- strophanthin
- strophe
- strophic
- stroppily
- stroppiness
- stroppy
- stroud
- strove
- strow
- struck
- struck joint
- struct
- structural
- structural ambiguity
- structural anthropologist
- structural anthropology
- structural basin
- structural botany
- structural change
- structural chemistry
- structural contour
- structural deficit
- structural engineer