だけでなくNot only… but also

のみならず and だけでなく are essentially synonymous in that they both express non-exclusivity (i.e. 'not only'), but differ in formality. While だけでなく is common in both everyday speech (often appearing as だけじゃなくて) and writing, のみならず is a highly formal expression used primarily in writing and academic contexts. Both phrases are often followed by a noun + も to convey 'not only (A), but also (B)'.

だけ conveys the meaning of 'only' or 'just'. だけでなく (or variant forms like だけではなく, だけじゃなくて, etc.) is a negation of this, combining だけ with で (the conjuctive form of だ) and なく (the conjunctive form of ない) to express the meaning of ‘not only (A)...but also (B)’. Unlike だけ, だけでなく will always be followed by a continuation of the sentence providing additional information, e.g. バナナだけでなく、リンゴも食べました (‘I ate not only a banana, but also an apple.’).

だけでなく (or だけでなくて, だけじゃなくて, etc.) is a common expression that means 'not only'. It is often followed by another noun + も in the expression だけでなく(て)～も, which has the meaning of 'not only (A), but also (B)', e.g. 肉だけでなく、魚も食べる ('I eat not only meat, but also fish.'). In other words, だけでなく(て)～も is an extension of the だけでなく pattern when you want to specify the additional thing or quality.

だけでなく and ばかりでなく convey the same essential meaning of 'not only'. Both expressions are often followed by another noun + も, which gives the added meaning of 'not only (A), but also (B)'. The main difference is that ばかりでなく is more formal and appears primarily in written or academic language. In everyday speech, the だけ version is more common, particularly in the variant form だけじゃなくて.

だけでなく and はもちろん both express non-exclusivity, but differ in nuance and emphasis. だけでなく simply means 'not only (A), but also (B)', e.g. 英語だけでなく、日本語も話せる ('He can speak not only English, but also Japanese.'). In contrast, はもちろん implies the first thing is obvious, while the second is more notable, e.g. 英語はもちろん、日本語も話せる ('He can speak English of course, but also Japanese.').

だけでなく and に限らず both express non-exclusivity, but differ in nuance and formality. だけでなく is a straightforward expression meaning 'not only (A), but also (B)', and is often used in everyday conversation (especially in the variant form だけじゃなくて). In contrast, に限らず has a more formal and academic tone, and carries a slightly different nuance, suggesting that whatever follows is 'not limited to' the thing in question.

だけでなく and をはじめ both express non-exclusivity, but differ in nuance. だけでなく simply means 'not only (A), but also (B)', e.g. 英語だけでなく、日本語も話せる ('He can speak not only English, but also Japanese.'). In contrast, をはじめ implies that something is the first in a list of many, e.g. 日本語をはじめ、様々な外国語が話せる ('He can speak many foreign languages, starting with Japanese.').