For one thing, he documents many neologisms, an activity that endears him to many working lexicographers.
( ( For ( one thing ) ) ( , ( he ( ( documents ( ( ( many neologisms ) , ) ( ( an activity ) ( that ( ( endears him ) ( to ( many ( working lexicographers ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (CD one) (NN thing))) (, ,) (NP (PRP he)) (VP (VBZ documents) (NP (NP (JJ many) (NNS neologisms)) (, ,) (NP (NP (DT an) (NN activity)) (SBAR (WHNP (WDT that)) (S (VP (VBZ endears) (NP (PRP him)) (PP (TO to) (NP (JJ many) (VBG working) (NNS lexicographers))))))))) (. .)))
Neologism is itself a neologism that he invented.
( Neologism ( ( ( is itself ) ( ( a neologism ) ( that ( he invented ) ) ) ) . ) )
(ROOT (S (NP (NNP Neologism)) (VP (VBZ is) (NP (PRP itself)) (NP (NP (DT a) (NN neologism)) (SBAR (IN that) (S (NP (PRP he)) (VP (VBD invented)))))) (. .)))