FlyFm Pagi Show End-Bit

To those new to this, the FlyFM Pagi Show is offering RM100 for the 8th,9th,10th caller who can guess the word that ends with 'um'. If they failed, the money will snowball to the next day. Today, the money has snowballed to RM10,600. Their studio phone number is 03-77241144

Provided Clues:
1. The word is provided by Amrita(the producer)
2. Only 2 person knows the answer, (Amrita and Fabes)
3. There's no silent letter words (eg: Chump, Stump)

Additional Clues
1. It's listed here
2. Fabes said that the word is "something.. something.. something.. um". So it must be a 4 syllable word like Co-li-se-um.

The wrong answer so far.

(01 Apr) : 1.Um 2.Requiem 3.Chump
(31 March) : 1.Swum 2.Labarum 3.Swum
(30 March) : 1.Glum 2.Adytum 3.Glum
(29 March) : 1.Chump 2. Hilum 3. Continuum
(25 March) : 1.Sanitarium 2.Museum 3.Ovum
(23 march) : 1.Platinum 2. Peplum 3. Phrum (I think)
(22 March) : 1.Humdrum 2.Tantalum (I think) 3.Slum
(19 March) : 1.Chum(Not a valid word) 2.Aurum 3.Planetarium
(17 March) : 1.Curriculum 2. Antebellum 3. Possum
(16 March) : 1.Pendulum 2. Museum 3. Basdium(I think)

Come back tomorrow. I'll be posting the wrong answers again whenever I can. Good luck!