As nouns the difference between session and talkfest

is that session is a period devoted to a particular activity while talkfest is (informal) a session of enthusiastic discussion or gossip.

As an adjective enthusiastic

is with zealous fervor; excited, motivated.

As a noun talkfest is

(informal) a session of enthusiastic discussion or gossip.

As nouns the difference between discussion and talkfest

is that discussion is conversation or debate concerning a particular topic while talkfest is (informal) a session of enthusiastic discussion or gossip.

As nouns the difference between gossip and talkfest

is that gossip is someone who likes to talk about someone else’s private or personal business while talkfest is (informal) a session of enthusiastic discussion or gossip.

As a verb gossip

is to talk about someone else's private or personal business, especially in a way that spreads the information.

In informal terms the difference between talkfest and chatfest

is that talkfest is a session of enthusiastic discussion or gossip while chatfest is a talkfest.

As adjectives the difference between luminous and ultraluminous

is that luminous is emitting light; glowing brightly while ultraluminous is very luminous.

As adjectives the difference between oligotrophic and ultraoligotrophic

is that oligotrophic is (physiology|of a diet) being deficient in nutrition while ultraoligotrophic is very oligotrophic.

As adjectives the difference between smooth and ultrasmooth

is that smooth is having a texture that lacks friction not rough while ultrasmooth is very smooth.

As an adverb smooth

is smoothly.

As a noun smooth

is something that is , or that goes smoothly and easily.

As a verb smooth

is to make smooth or even.

As nouns the difference between sonication and ultrasonication

is that sonication is the process of disrupting or homogenizing something, usually a chemical solution or biological medium, with sound waves while ultrasonication is sonication using ultrasound.

As nouns the difference between ultrasound and ultrasonication

is that ultrasound is sound with a frequency greater than the upper limit of human hearing; approximately 20 kilohertz while ultrasonication is sonication using ultrasound.