alertness

As nouns the difference between arousal and alertness

is that arousal is the act of arousing or the state of being aroused while alertness is the quality of being alert or on the alert; briskness; nimbleness; activity.

As nouns the difference between alertness and apertness

is that alertness is the quality of being alert or on the alert; briskness; nimbleness; activity while apertness is (archaic) openness; frankness.

As nouns the difference between strain and alertness

is that strain is (obsolete) treasure or strain can be the act of straining, or the state of being strained while alertness is the quality of being alert or on the alert; briskness; nimbleness; activity.

As a verb strain

is (obsolete) to hold tightly, to clasp.

As nouns the difference between consciousness and alertness

is that consciousness is the state of being conscious or aware; awareness while alertness is the quality of being alert or on the alert; briskness; nimbleness; activity.

As nouns the difference between alertness and wakefulness

is that alertness is the quality of being alert or on the alert; briskness; nimbleness; activity while wakefulness is the state of being wakeful.

As nouns the difference between alertness and ampakine

is that alertness is the quality of being alert or on the alert; briskness; nimbleness; activity while ampakine is any of a class of chemical compounds that enhance attention span and alertness and facilitate learning and memory.

As nouns the difference between alertness and psychostimulant

is that alertness is the quality of being alert or on the alert; briskness; nimbleness; activity while psychostimulant is category:en:Drugs A drug that acts to temporarily increase mental alertness or awareness.

As an adjective psychostimulant is

tending to increase mental alertness and awareness.