Yes.
With an election to have proceeds paid under an installment or life income option, the gain can be spread over a fixed period of years or over the payee’s lifetime ( Q 52). Tax on the gain also may be postponed by electing the interest-only option before maturity and retaining no withdrawal rights ( Q 21).
Another method to postpone the gain appears to be a situation in which the endowment is exchanged before maturity for a deferred annuity ( Q 44, Q 570). The IRS has ruled that the exchange of an endowment for an annuity is a tax-free exchange.1