1. (noun) a small lump or protuberance

• nubble

2. (noun) a small piece

• stub

3. (noun) the choicest or most essential or most vital part of some idea or experience

• center
• centre
• core
• essence
• gist
• heart
• heart and soul
• inwardness
• kernel
• marrow
• meat
• nitty-gritty
• pith
• substance
• sum

1. (noun) a small piece

• nubbin

2. (noun) the choicest or most essential or most vital part of some idea or experience

• bare bones
• haecceity
• quiddity
• hypostasis
• quintessence
• stuff

1. (noun) a small lump or protuberance

• bulge
• bump
• excrescence
• extrusion
• gibbosity
• gibbousness
• hump
• jut
• prominence
• protrusion
• protuberance
• swelling

2. (noun) a small piece

• part
• piece

3. (noun) the choicest or most essential or most vital part of some idea or experience

• cognitive content
• content
• mental object

1. (noun) a small lump or protuberance

• homespun
• homespun
• nubbly
• nubbly
• nubby
• nubby
• slubbed
• slubbed
• tweedy
• tweedy

2. (noun) the choicest or most essential or most vital part of some idea or experience

• all important
• all-important
• crucial
• essential
• of the essence
• cardinal
• central
• fundamental
• key
• primal
• meaty
• substantive
• pithy
• sententious
• summate