There are several words that are synonymous with "point observation." One of them is "spot check," which means to examine or verify something quickly without conducting a thorough investigation. Another word is "snapshot," which is a metaphorical term for a brief or fleeting glance at something. "Glimpse" is another synonym, which means a quick or incidental view of something. "Peek" is another word, which means a quick or surreptitious look at something, often from a hidden or concealed position. "Glance" is another synonym, which means a brief or cursory look at something. Overall, these words convey the idea of a brief, quick, or cursory view of something, rather than an extensive or in-depth investigation.