In 1965, Dmitri Borgmann noted that this expression:

11 + 2 – 1 = 12

… is valid also when interpreted as a set of characters:

11 “+ 2” = 112; 112 “- 1” = 12

… as a set of Roman numerals:

XI + II = XIII; XIII – I = XII

… and even as a set of letters:

ELEVEN + TWO = ELEVENTWO
ELEVENTWO – ONE = LEVETW (= TWELVE)

GOLDENROD-ADORNED LOG is a palindrome.

In this sentence there are sixteen words, eighty-one letters, one hyphen, four commas, and one period.

apodyopsis
n. the act of imagining a person naked

shunpike
n. a side road taken to avoid turnpike tolls or traffic

(Thanks, David.)

martext
n. a blundering preacher

Devised by Lee Sallows, each of these lists inventories its own contents:

• fifteen e’s, seven f’s, four g’s, six h’s, eight i’s, four n’s, five o’s, six r’s, eighteen s’s, eight t’s, four u’s, three v’s, two w’s, three x’s
• sixteen e’s, five f’s, three g’s, six h’s, nine i’s, five n’s, four o’s, six r’s, eighteen s’s, eight t’s, three u’s, three v’s, two w’s, four x’s