"falter" in the noun sense
1. hesitation, waver, falter, faltering
the act of pausing uncertainly
"there was a hesitation in his speech"
"falter" in the verb sense
1. falter, waver
be unsure or weak
"Their enthusiasm is faltering"
2. falter, waver
move hesitatingly, as if about to give way
3. stumble, falter, bumble
"The drunk man stumbled about"
4. bumble, stutter, stammer, falter
"The speaker faltered when he saw his opponent enter the room"
Source: WordNet® (An amazing lexical database of English)
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