vary in WordNet English dictionary

1. become different in some particular way, without permanently losing one's or its former characteristics or essence
   "her mood changes in accordance with the weather"; "The supermarket's selection of vegetables varies according to the season"
   change  alter  vary 
   
2. be at variance with; be out of line with
   deviate  vary  diverge  depart 
   
3. make something more diverse and varied
   "Vary the menu"
   vary  variegate  motley 
   
4. be subject to change in accordance with a variable
   "Prices vary"; "His moods vary depending on the weather"
   vary