Observe
Part of speech: verb
Definition: To notice or view, especially carefully or with attention to detail. To follow the custom, practice, or rules (especially of a religion.) To comment on something; to make an observation.
Example sentence: The more you observe politics, the more you've got to admit that each party is worse than the other.
Mention
Part of speech: noun
Definition: A speaking or notice of anything, usually in a brief or cursory manner. Used especially in the phrase to make mention of.
Part of speech: verb
Definition: To speak of something.
Example sentence: Last night I neglected to mention something that bears repeating.