warfare -|- like lengthwise, even though the two words that make up ‘warfare' can stand alone, when used together they are one word.  

waste -|- waster is taste with a ‘w'. 

we're -|- We're is the contraction for "we are".  

weather/ whether -|- Weather is the temperature and atmosphere out side. Whether is a conjunction that introduces alternative or possibilities. Example: The weather man tells whether to expect rain or shine.  

Wednesday -|- BREAK IT UP! Say it out loud. wed – nes – day. 

weird -|- What's weird about spelling this word is the -e before the -i even though there's no -c. Weird! 

willful -|- Don't be willful when spelling this word, give up the urge to add that second –l to the end.  

writing -|- Since write ends with an –e, you have to drop it to add the –ing.