Territorial Army 
(In the UK) a volunteer force founded in 1908 to provide a reserve of trained and disciplined military personnel for use in an emergency. Called since 2013 Army Reserve.
- straighten
- straightener
- straightening iron
- straight-faced
- straight flush
- straightforward
- straightforwardly
- straightforwardness
- straight from the shoulder
- straightish
- straightjacket
- straight-laced
- straight-line
- straightly
- straight man
- straightness
- straight off (or out)
- straight (or right) away
- straight pool
- straight razor
- straight shooter
- straight-shooting
- straight-six
- straight stitch
- straight-talking