- Opt Verb
- Opt in Verb
- Opt out Verb
- Optant Subst. Adj.
- Optate Verb
- Optation Subst.
- Optative Adj. Subst.
- Opthalmic Adj.
- Optic Adj. Subst.
- Optical Adj.
- Optically Adv.
- Optician Subst.
- Opticist Subst.
- Opticity Subst.
- Opticochiasmal Adj.
- Opticochiasmatic Adj.
- Opticociliary Adj.
- Opticoencephalitis Subst.
- Opticofacial Adj.
- Opticohemiplegic Adj. Subst.
- Opticospectral Adj.
- Optics Subst. Adj.
- Optimal Adj.
- Optimality Subst.
- Optimally Adv.
- Optimat Subst. Adj.
- Optimate Subst. Adj.
- Optimeter Subst. Adj.
- Optimisation Subst. Adj.
- Optimise Verb
- Optimised Adj. Part. Perf.
- Optimism Subst.
- Optimist Subst.
- Optimistic Adj.
- Optimistical Adj.
- Optimistically Adv.
- Optimization Subst. Adj.
- Optimize Verb
- Optimized Adj.
- Optimizer Subst. Adj.
- Optimum Adj. Subst.
- Option Subst. Verb Adj.
- Optional Adj. Subst.
- Optionality Subst.
- Optionally Adv.
- Optionee Subst.
- Optioner Subst.
- Optionor Subst. Adj.
- Optoacoustic Adj.
- Optocoupler Subst. Adj.
- Optoelecronic
- Optoelectronic Adj.
- Optoelectronics Subst.
- Optogalvanic Adj.
- Optogram Subst. Adj.
- Optoisolation Subst. Adj.
- Optoisolator Subst. Adj.
- Optokinetic Adj.
- Optomechanical Adj.
- Optometer Subst. Adj.