If a word with this ending is a noun, then usually the pronunciation is mənt , unless the last syllable is stressed. Some examples:
arrangment = əˈreɪndʒmənt
fulfilment = fʊlˈfɪlmənt
monument = ˈmɒnjəmənt
pavement = ˈpeɪvməntbut
cement = sɪˈment
If, on the other hand, the word is a verb, then the pronunciation is ment. There are a number of noun/verb pairs which are distinguished by the pronunciation of the ending.
| NOUN | VERB |
| ˈkɒmplɪmənt | ˈkɒmplɪment |
| ˈdɒkjəmənt | ˈdɒkjəment |
| ˈɪmplɪmənt | ˈɪmplɪment |
| ˈsʌplɪmənt | ˈsʌplɪment |
Annoyingly, or intriguingly, depending on your point of view, the noun torment is pronounced ˈtɔːment and the related verb is tɔːˈment.
By the way, the last syllable of my surname is pronounced mənt.