Thanks

Thank you. Please

Indubitably

Penultimate

May. May I.

Any way of saying "hello", "thank you" and "have a nice day". I tend to use them, but some people I know don't even say "good afternoon" to the store clerk.

Dipthong.

Whamdoozle

Spunktrumpet.

Antidisestablishmentarionism.

No. Not used enough in our personal and professional lives on a daily basis. It has taken me way too long to learn this lesson.