non·rig·id 
(nŏn-rĭjĭd)
(nŏn-rĭjĭd)adj.
1. Not rigid: a nonrigid frame.
2. Of, relating to, or being a lighter-than-air aircraft that holds its shape by gas pressure.
- thermolytic
- thermometer
- thermometric
- thermometry
- thermomotor
- thermonuclear
- thermoperiodicity
- thermoperiodism
- thermophile
- thermophilic
- thermopile
- thermoplastic
- thermoplasticity
- Thermopylae
- thermoreceptor
- thermoregulate
- thermoregulation
- thermoregulatory
- thermoremanent magnetization
- thermos
- thermosetting
- thermosphere
- thermospheric
- thermostabile
- thermostability