lifetime is just one word and you don't use a hyphen.
(example): Hopefully my parents won't die during my lifetime.
hyphen
The correct spelling of the 45-letter word (coined to be the longest in the dictionary) ispneumonoultramicroscopic-silicovolcanoconiosis(a form of silicosis, a lung disease).*There is no hyphen in the word. The hyphen is required to fit the limitations of this page.
Because that is just how the word is spelled. It would be like asking why table isn't separated by a hyphen: Because that is how the word is spelled.
French uses the English expression, but they spell it with a hyphen: le snack-bar.
good bye good-bye goodbye (this is the right way)
No there's not a hyphen.
The correct spelling of the 45-letter word ispneumonoultramicroscopic-silicovolcanoconiosis (hyphen added to prevent truncation).
The correct spelling is indeed this: WikiAnswers - one word; no hyphen' uppercase "W" and uppercase "A."
Yes, it is correct to spell "counter-proposal" with a hyphen. This helps to clarify that it is a compound word made up of two separate words.
Some dictionaries list it without a hyphen, as "housesit" (and housesitter, akin to babysitter). This is likely a case of evolving usage. Many spell checkers will only accept the two-word form.
No. Just looked it up in a printed dictionary. In fact, no work with the 'multi' prefix uses a hyphen. For example, multilateral
When it's used as a verb, spell it as follow up (no hyphen). When it's used as a noun or adjective, there is a hyphen (follow-up). Go to dictionary.com. In the Dictionary tab, type in the words 'follow up' without the hyphen. This will help you a lot.