difference between cooperate and collaborate

cooperate - (

For starters, they are synonyms.

There is a subtle difference however.

• When you cooperate with someone you work with them, help them, do what someone has asked or told you to do. And you do it without complaining or arguing.
• Cooperation could just mean that you've given me help on something I'm working on and that I'm ultimately responsible for.)

collaborate - (

• If you collaborate with me on a project, we have shared authorship.

• ollaboration is linked to "agreement" (like a contract for a common short-term benefit

• Collaborate means to work together with 2 or more people to produce a piece of work. It’s a co-production. Collaborate is particularly used in the context of whole-of-government contexts, or multi-agency contexts. In other words, to produce a result when multiple agencies are involved, all players must collaborate – work together to produce a result.)

difference between country and countryside

country - (Country is used to describe rural areas (our of town)?
He lives in the country.)
countryside - (Countryside is usually used when you are talking about the beauty or peacefulness of a country area)

some expression with suit

it is quiet useful lesson, and you could learn more expression used suit word. because this word is very common in english

difference between tune and melody

tune - (If someone were to say to me "He played a delightful little melody on the piano", I'd expect him to have used a single finger, while "a delightful little tune" is more likely to have involved both hands.)
melody - (If someone were to say to me "He played a delightful little melody on the piano", I'd expect him to have used a single finger, while "a delightful little tune" is more likely to have involved both hands.)

What's the difference between a tune and a melody?

• Tune can mean a song as a whole as well as its main musical theme, while melody is usually restricted to the latter, at least nowadays. If someone were to say to me "He played a delightful little melody on the piano", I'd expect him to have used a single finger, while "a delightful little tune" is more likely to have involved both hands. ("A delightful little song" would remove all ambiguity.)  Melody is more likely than tune to be used in opposition to harmony. If you're singing in the choir and ask "who has the melody at the fifth measure", the answer will be (probably) "the sopranos"; but if you ask "who has the tune", you'll either get puzzled looks, or someone will play an A on the piano. It's a bit subjective, but I think tune is less formal than melody: if you're whistling it, it's a tune, but if Maria Callas sang it, it's a melody.

• Mainly spelling. That is, tune and melody are very, very similar; I would treat them as synonyms. The MacOS X dictionary (not a dreadfully authoritative source of information) defines 'tune' as MELODY and 'melody' as TUNE, supporting my contention. There are other words used in the definitions, but they come up very similar: