Sorry just being facetious. Which is a lovely thing to be, as it contains each vowel once, in order.
2) is easiest, anagram of sweatshirt (tailored), slightly old-fashioned word, but attainable with or without anagram solver.
3) is a homonym. if it sound like objectiveS, plural, it probably ends in nSe...it does.
1) well there is a very common dog that fits, so why is it that...?
to err is to stray, and the rest is an obscure synonym for fastener.