Asleep and Flatfooted

Asleep adjective - Being in a state of suspended consciousness.

Flatfooted and asleep are semantically related In some cases you can replace term "Flatfooted" with "Asleep", this adjectives are similar.

Asleep and flatfooted are semantically related in unprepared topic. Sometimes you can use "Asleep" instead the word "Flatfooted" as an adjective or an adverb, if it concerns topics such as when not paying attention.