Synonyms of observing

1 Syllable
keen, spying
2 Syllables
alert, conscious, voyeurism, noting, sentient, mindful, thoughtful, arrect
3 Syllables
noticing, mentioning, perceiving, regardful, aware
4 Syllables
penetrating, wiretapping
5 Syllables
investigations, apperceptive, supraliminal, investigation, observative
6 Syllables
commemorative