The words throes and throws are homophones: they sound alike but have different meanings. The plural noun throes means a great struggle or a condition of agonizing pain or trouble. The idiom in the throes of means in the midst of some painful or difficult experience. Throws is the third-person present singular form of the verb throw--to toss, hurl, or discharge. Consider the sentences below:
The word throw originated from Old English thrāwan ‘to twist, turn’, of West Germanic origin; related to Dutch draaien and German drehen, from an Indo-European root shared by Latin terere ‘to rub’, Greek teirein ‘wear out’. Sense 1 of the verb, expressing propulsion and sudden action, dates from Middle English.
Throws as verb:
Give or hold (a party) is also referred to as throw.
Throes as noun:
And while the resistance may be symptomatic of death throes, a rage at the dying of the white male light, it nonetheless presents a very real threat — there is the possibility that the old and angry may triumph over the new and different. (The Huffington Post)
Kelsey Mitchell hit six free throws in the final 1:14 to help the Ohio State women’s basketball team rally past Michigan State 85-80 in the Big Ten opener for both teams on Thursday. (The Columbus Dispatch)
Throws or throes:
Throes is a violent condition, a painful struggle. Throes is a plural noun, it is almost never expressed as a singular, throe. Throes is possibly derived from a thirteenth century English word, throwe, which means pang of childbirth, agony of death, which may in turn have come from the Old English word þrawan which means twist, turn, writhe or the Old English word thrēa meaning calamity. Throws is the present tense of the word throw, which means to toss something, to propel something through space. Throws is also the plural of the noun throw. Throws comes from the Old English word thrāwan which means to turn, to torment.