spotter has definitions from the fields of work,geography
1
[ noun ] (work) a worker employed to apply spots (as markers or identifiers)

Related terms

employee spot

2
[ noun ] (work) a worker employed at a dry-cleaning establishment to remove spots

Related terms

employee

3
[ noun ] (geography) someone who is the first to explore a place

Synonyms

finder discoverer

4
[ noun ] (work) a person employed to watch for something to happen

Related terms

watchman descry

5
[ noun ] someone who is the first to observe something

Synonyms

discoverer finder

Related terms

perceiver

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