therefor / therefore [ˈðeərfo:r]
therefor – adv. & v. – adv. – for that, in return for that; v. – (colloq. US) to be available to comfort or support a person in a time of trouble (usually written in two words not one)
therefore – adv. & n – adv. – 1. then, accordingly; 2. for that reason, hence, consequently; n. – marking an expressed conclusion or inference