Open English Wordnet
Nouns
(n)throb, throbbing, poundingan instance of rapid strong pulsation (of the heart)“he felt a throbbing in his head” (n)throbbinga sound with a strong rhythmic beat“the throbbing of the engines” Adjectives
(s)throbbingpounding or beating strongly or violently“a throbbing pain”,
“the throbbing engine of the boat”