Safeties.
Lis pendens is considered a singular and plural version of the word. You would NOT spell it "lis pendenses" as the plural. You simply use the same word as singular and plural.
"Safeties" is the plural for safety.
The plural should be TVs (using the apostrophe TV's indicates a possessive).
The plural would be a normal S plural, twos. As a numeral, 2s is recommended, but the generally frowned-upon apostrophe version (2's) is sometimes clearer.
The plural of a letter can be written using an apostrophe, which is usually not a valid way to form a plural. The plural spelling S's could also be a possessive, but Ss would probably be unclear. The phonetic version is esses, which is the plural of ess.
pixaxe is the singular version, pickaxes is the plural version.
The plural way to spell studio is studios.
The plural is "emeralds."
The plural is bridges.
The plural is resources.
The plural is cherries.
The plural is hooves.