Yes, it's "Shut-up"
The standard abbreviation for second is 's' (not 'sec')
escapeessayesteemestimateescaroleestimateescrowesquire
The ordinal word form for 52 is: fifty-second
fungi
One such word is ears.
pictures
blameless
carotenes
rinse
A five letter word with the second letter U, third letter C, ending with S is MUCUS.
process
depress