The letters spell assured.
roster
r-e-s-p-o-n-d
No it is 'frustrated'
The word meaning "calamity" is spelt as you have done in the question.
s-u-p-e-r-c-a-l-f-r-a-g-i-l-i-s-t-i-c-e-x-p-i-a-l-i-d-o-c-i-o-u-s!
roster
Two options:reddesttedders
f r u s t r a t e d
Those letters spell dessert.
"D-i-s-a-p-r-o-v-e"
r-e-s-p-o-n-d
No it is 'frustrated'
s-l-a-u-g-h-t-e-r-e-d ...
"Searched" is spelled as s-e-a-r-c-h-e-d.
s c u b a d i v e r
beduins
Take an S out. D-I-S-A-P-P-E-A-R is how to spell it.