【Flash】 ,  【gleam】 ,  【glance】 ,  【glint】 ,  【sparkle】 ,  【glitter】 ,  【glisten】 ,  【scintillate】 ,  【coruscate】 ,  【twinkle】  mean to shoot forth light (as in rays or sparks).

【Flash】 implies a sudden and transient outburst of light or a sudden display of something that brilliantly reflects light or seems lighted up.

【Gleam】 implies a ray which shines through an intervening medium or against a background of relative darkness.

【Glance】  implies darting or obliquely reflected light;  【glint】 implies quickly glancing or gleaming light.

【Sparkle】  suggests quick, bright, brief, and innumerable small flashes of light;  【glitter】  connotes greater brilliancy or showiness than  【sparkle】 , sometimes with the implication of something sinister.

【Glisten】 implies a more or less subdued 【sparkle】 , 【glitter】 , or gleaming that suggests the lustrous shining quality of a moist surface.

【Scintillate】  implies the emission of sparks in a steady stream or a sparkling suggestive of such an emission;  【coruscate】 the emission of a brilliant 【flash】 or succession of flashes; both words have extended as well as literal use.

【Twinkle】 suggests a soft and intermittent sparkling, often wavering and lustrous.