Iontrálacha san Fhoclóir Nua Béarla-Gaeilge a bhrabhsáil
- officiate
- officiating
- officious
- officiously
- offing
- offline
- offload
- offprint
- offset
- offset lithography
- offset mortgage
- offset printing
- offsetting
- offshoot
- offshore
- offshoring
- offside
- offside flag
- offside rule
- offside trap
- offspring
- offstage
- oft
- oft-
- often
- oftentimes
- ogle
- ogre
- oh
- ohm
- oil
- oil can
- oil change
- oil company
- oil drum
- oil field
- oil filter
- oil giant
- oil lamp
- oil mill
- oil paint
- oil painting
- oil palm
- oil pipeline
- oil platform
- oil refinery
- oil rig
- oil slick
- oil spill
- oil tank